Past Record of Air Pollution Index (English Version)

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• ID: hk-epd-airteam-past-record-of-air-pollution-index-en
• Publisher: Environmental Protection Department · Markdown
• Categories: Environment · Markdown
• Tags: Not stated
• Resources: 174
• Updated: 2025-08-04T17:08:06.158567
• Harvest started: 2026-10-20T22:31:00.105Z
• Licence: Not stated
• Source: Official metadata record

Harvest started is the source harvest start associated with this record, not its precise retrieval time. Updated is an upstream metadata claim.

Description

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations from July 1999 to December 2013 (English Version)

Resources

These are upstream resource links from metadata. Resource contents and endpoint availability have not been verified here.

Past record of Air Pollution Index (English) Dec 2000

• Resource ID: 009566df-d75d-4295-8ebc-7017ef1a73bd
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:43.712193
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2009

• Resource ID: 0799536c-1982-4e05-8f07-6d38e827ba38
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:57.406581
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 1999

• Resource ID: 07c84399-24cc-4716-a7d4-b0ebafb849a5
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:31.153766
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr121999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2010

• Resource ID: 08d028ed-87d3-4d87-8c67-72ed555605fd
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:12.191818
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2011

• Resource ID: 10f29c0f-8e84-473e-abb8-fb1d929444c6
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:10.021449
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2008

• Resource ID: 12e3e29f-4843-43cf-a854-13eb790be160
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:53.850898
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2004

• Resource ID: 14b99d7c-02d4-4605-9da7-67e6779fed73
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:06.673753
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2011

• Resource ID: 16a6add6-3a01-4d26-883d-b9f15fe75be1
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:40.564493
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2007

• Resource ID: 1713966d-8415-47f6-95e6-c5af7b0dbab0
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:38.919091
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2011

• Resource ID: 18262ff4-6f90-47b7-8240-dd0bfff1c1e9
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:59.435247
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2005

• Resource ID: 1869dfd1-0024-499b-b7d5-6ccfaa88f74a
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:52.855718
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2009

• Resource ID: 1b3a0af2-b432-46e0-8cd2-bf6df608d0b7
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:23.727493
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2007

• Resource ID: 1c86f8fa-9d5d-463e-8eee-2a494b8d00d9
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:34.395325
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2013

• Resource ID: 1daa93df-ea05-4b03-b8bc-c45b1106f54e
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:43.903746
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 1999

• Resource ID: 23cd82b2-b637-4c38-8b4e-a244da93b788
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:23.516674
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr071999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in July 1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2010

• Resource ID: 28f01548-6155-427c-8c16-9aa68d20c93b
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:23.132453
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2005

• Resource ID: 29adeb4c-aa3d-49c4-8932-c423b3f4098a
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:33.290041
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2011

• Resource ID: 2b5bfd39-5764-4065-ab6f-a611d5c08da8
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:12.820530
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2008

• Resource ID: 2c46effc-927b-4830-8f77-480d2a1732d9
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:37.557828
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2004

• Resource ID: 2c57f6e4-aab1-4bc5-98e6-c12be7fc725d
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:26.998355
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2004

• Resource ID: 30af46e8-5fb7-44c0-b0b3-9cf220a78434
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:01.110065
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2004

• Resource ID: 32d3e36f-1abe-44bd-9bd3-1625848c6c88
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:23.919179
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2008

• Resource ID: 34c94370-5217-4e36-8bbc-80d203dcb69e
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:03.244914
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2003

• Resource ID: 350d3aee-6ddb-4cfa-bb8e-a7d9e0754aa9
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:50.563254
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2008

• Resource ID: 361473eb-9773-4340-a2a6-2dd85fa347f0
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:18.054764
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2001

• Resource ID: 368e7081-2781-43b5-9224-5ada1b006f78
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:50.386608
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2006

• Resource ID: 38997672-8c45-4f27-9d3b-47dddc61d950
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:30.602567
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2004

• Resource ID: 38ca6b62-dec4-4bf1-97e8-5266a44fefe8
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:03.989449
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2012

• Resource ID: 39050807-a8fa-425b-ad29-468b4e24c6d9
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:05.236631
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2003

• Resource ID: 3981febf-819d-4daf-8509-241b1c6b34a5
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:38.182704
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2013

• Resource ID: 3d6afb22-98bf-48a0-a297-50c30c6cf464
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:54.189240
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2000

• Resource ID: 4094f06f-5428-4837-b80b-e8c515be1b5d
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:39.112902
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2002

• Resource ID: 41ee2c6e-6fdd-46fa-8933-d25a0bee4211
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:18.270280
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2007

• Resource ID: 4458aa35-0bdf-4675-b459-1935953075e7
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:07.238189
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2004

• Resource ID: 45ed7718-a4f6-4e57-9086-943423a0e300
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:09.444852
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2003

• Resource ID: 4752947f-2579-4f3c-9a30-2cf81679f94a
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:28.664195
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2008

• Resource ID: 47c5d292-2fd1-4937-8af6-c4c580c2007c
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:42.366157
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2009

• Resource ID: 4869dc0e-a8c1-4016-be92-1df5ffd61791
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:02.882296
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2010

• Resource ID: 49aeef70-4fe9-4453-b1c5-5180deabb95b
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:28.657022
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2006

• Resource ID: 4a7ac76b-938e-405a-a386-878f9a8c5373
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:18.652267
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2006

• Resource ID: 4ac7697b-8d6e-483a-91d4-5154702d1cb5
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:49.842826
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2002

• Resource ID: 4b8a24b9-e2d6-4c2d-b02c-6e25c5e4d295
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:14.205531
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2006

• Resource ID: 4c0bdea9-ee53-4d94-8945-6a3a20790583
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:34.279698
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2005

• Resource ID: 4f5b0cc7-ef00-41c4-bbe8-09717e30760e
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:46.055610
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2012

• Resource ID: 4fd40312-5ce8-4438-8874-94442cd36f68
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:32.428374
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2008

• Resource ID: 50431348-2cd2-4196-9f57-2d42873f26ce
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:58.309210
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2001

• Resource ID: 505f5a13-2629-4cf3-aa7a-3de5964d4ba3
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:49.038744
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2003

• Resource ID: 52d2a235-11fb-4c85-a294-4a3aabacb9c6
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:33.549804
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2006

• Resource ID: 53d18324-5599-476a-918f-413359a683c1
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:41.895120
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2009

• Resource ID: 54b4e4db-13f7-45b4-a525-3f0692fc1fef
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:34.577061
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2010

• Resource ID: 571edbd7-3ada-4d80-97b2-95954096f8cd
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:46.301819
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2013

• Resource ID: 59a82eca-2163-4670-ab6e-a4f02cd51f29
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:36.819404
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2012

• Resource ID: 5b84c9c6-a658-41c5-88f7-ec96341a3f10
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:25.854350
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2001

• Resource ID: 5c55d119-221e-4efc-9cd3-1096a718a180
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:56.296133
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2000

• Resource ID: 5ce56bf3-a5ab-4ac6-ad62-5e709612b576
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:32.830018
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2001

• Resource ID: 5da46201-223a-42ae-a5b3-4d806709347c
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:45.042965
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2009

• Resource ID: 5fbea4fc-4b47-4ac5-95e7-9dea33405028
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:39.927465
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2008

• Resource ID: 63af4eee-e5f0-4b61-b918-32719a258e44
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:47.190945
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2002

• Resource ID: 63c8880e-47b2-4afc-beb1-20b11874b891
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:12.306040
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2002

• Resource ID: 64b8852c-18e5-4304-a089-fdc192e1ce1e
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:03.148002
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2012

• Resource ID: 657c008e-fb23-40ba-8019-a8f46d9b6f5f
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:38.932897
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2002

• Resource ID: 65c3ab0e-21ff-4854-a485-18a9985c80c3
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:20.291396
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2003

• Resource ID: 668649df-7068-4ade-98ba-2d7a37c78ce1
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:47.995129
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2008

• Resource ID: 6b77f659-1f63-45fe-9924-8bb164ed403e
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:13.041228
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2005

• Resource ID: 6c22bb62-88d1-4426-8ff3-b1b64650bc77
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:42.817355
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2010

• Resource ID: 6ca4815c-b7c7-4937-875c-259721c0bcab
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:04.072663
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2000

• Resource ID: 6d4e38df-49bc-4232-b8ff-2e79b2c20bd4
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:40.220510
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2011

• Resource ID: 6e9d7754-2eb3-4dbc-9824-cc494b0fc40e
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:34.020753
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2000

• Resource ID: 70587bc0-de66-4526-a7dd-77bf37614eb4
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:41.340817
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2000

• Resource ID: 7115dd28-d98b-45f5-a31d-09d0107f9c4d
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:36.694055
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2010

• Resource ID: 717e0289-c74a-465e-bf68-d0bd40e96730
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:06.820084
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2013

• Resource ID: 7190fe8e-3db2-4c8a-bcd7-53be4982b9d4
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:15.300133
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2011

• Resource ID: 720009f5-0d01-48be-8160-5ee62fdf5927
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:15.896156
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2011

• Resource ID: 72e2f7c4-3117-4924-8708-e5940e31409c
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:52.927159
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2003

• Resource ID: 73ecc05f-254f-450e-9ed3-8d3f327548de
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:40.506899
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2012

• Resource ID: 74c28e96-0e61-4d28-b5fb-14773c46a9b8
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:52.090817
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2004

• Resource ID: 74deb33d-83ce-4b39-a911-fa94f93b337a
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:55.710202
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2000

• Resource ID: 75499599-894a-4fdf-83b7-1e27d3c130b8
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:37.836902
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2002

• Resource ID: 75f0d4a9-5d62-4b63-8639-c8db9a989a88
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:22.349227
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2006

• Resource ID: 787a8f9b-1d1f-4529-91d7-594b162b603c
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:26.043013
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2007

• Resource ID: 78b4e167-753e-4732-ba8e-4e491d51b199
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:02.023571
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2001

• Resource ID: 794322e2-b4ad-4e2a-9ad5-65fab87eced3
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:54.762922
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2002

• Resource ID: 79d50806-6f8e-45ca-83db-57828566097c
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:16.182984
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2011

• Resource ID: 7a39cca0-3a8c-464c-a47d-e4612ed69f56
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:46.851940
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2009

• Resource ID: 7bfe9c50-3c93-4c6d-8114-93496d44d2b9
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:08.277098
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2010

• Resource ID: 7c04e687-4fe8-41aa-a888-a419182bceec
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:01.352697
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2007

• Resource ID: 83ebee45-17e9-49a3-b627-6628d327fd79
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:29.526336
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2005

• Resource ID: 83f7588c-059d-49b9-a4a2-652718314a5b
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:49.363056
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2002

• Resource ID: 845bc941-b3f6-4d1d-a628-fa7b42215b18
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:10.435656
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2006

• Resource ID: 84dd3107-a1de-4b4e-a45d-cd251d8d1418
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:53.737571
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2012

• Resource ID: 852aa62d-0d89-4d51-a9f0-e3de3a7d462c
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:58.387362
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2007

• Resource ID: 875d96f2-2c7a-4270-9383-06fc63fb18bc
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:49.371027
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 1999

• Resource ID: 88dab56c-fd89-4f04-b036-86cec34ff4ed
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:28.553635
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr091999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2005

• Resource ID: 89474a87-bb04-4d9d-a5bf-a66955b34b81
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:36.429290
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2005

• Resource ID: 8a280417-726f-45a5-80bd-4b178188c531
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:39.592250
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2007

• Resource ID: 8a5f6f3f-e843-4c7b-be76-9cf2f28ba6d1
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:57.843132
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2006

• Resource ID: 8a85714f-e58c-441e-9e08-4c8b876443ac
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:38.157998
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2008

• Resource ID: 8ac9217d-b3b5-40e5-927c-002668cb4d09
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:27.590148
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2004

• Resource ID: 8d15f36a-0ed4-44cf-be96-7e6b8e913f5d
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:15.191616
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2013

• Resource ID: 8d239455-f39e-4647-b401-cd5194995e98
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:29.797009
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2005

• Resource ID: 8ff5a0ee-19fd-4224-bf01-c54d3a3290e7
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:03.215679
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2009

• Resource ID: 907bab91-43f4-4969-b01f-3d957c6459ec
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:52.345205
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2012

• Resource ID: 91ae602c-c0b2-4a3b-81db-c249a1b3d767
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:26.064649
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2008

• Resource ID: 93ae1e4f-02bb-4e8c-ba66-96064e64987a
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:32.564843
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2012

• Resource ID: 96248800-5d4a-4d61-aa6f-798abc382f75
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:45.681506
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2007

• Resource ID: 9ab570fd-7b5c-4be1-a709-3e2ce9d0b94c
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:15.852777
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2012

• Resource ID: 9af21930-ddcd-4772-95dc-6ceb96950ef7
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:32.965917
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2012

• Resource ID: 9bece13a-0073-4a65-ae66-a5b41e51cec4
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:40.753590
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2007

• Resource ID: 9cfcdc46-f466-451a-aefc-f374acc0b7d2
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:11.609309
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2003

• Resource ID: 9d3b18f8-8347-4644-b8b7-41ce729ea684
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:42.900120
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2013

• Resource ID: 9f6b5746-9975-426c-a728-acac4e2279fe
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:08:06.192050
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2004

• Resource ID: 9f9bc707-2aab-4a7f-b1ff-28dc75488316
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:21.031181
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2007

• Resource ID: a527c60a-da98-4230-b408-29bc0f0eff49
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:20.292060
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2000

• Resource ID: a59920b8-ed57-4717-9f99-fb1bcb800204
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:33.722588
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2013

• Resource ID: a66e42c8-de70-4f3d-a597-dc536f848e2d
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:01.172994
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2002

• Resource ID: ac3a381d-1863-42fc-b378-8b89dba3b3b3
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:04.952962
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2005

• Resource ID: b0c8bc3e-49d7-4a3a-b4c4-69b742726918
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:30.318659
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2003

• Resource ID: b0feb321-708c-4794-913e-f9f701315c21
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:53.125816
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2003

• Resource ID: b1249094-d096-45e1-98fa-16b9cb9f1288
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:45.472256
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2002

• Resource ID: b1ecb7bf-d497-4c1e-869f-de87be21cc86
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:08.514083
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2006

• Resource ID: b50ac1af-685d-4ac9-9c03-df2b69e42b10
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:15.097305
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2000

• Resource ID: b58d1615-824b-4b40-942d-e0be8a848064
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:42.500303
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2010

• Resource ID: b5cb3f66-05b6-4621-92f4-2a5c425ff0f5
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:52.040074
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2000

• Resource ID: b606c28c-b9e9-4e16-9371-37172a494115
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:31.978663
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2008

• Resource ID: b663ceed-63d0-4e26-81ff-aa324c1805fe
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:08.008510
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2005

• Resource ID: b85b1d6b-061d-4f12-b365-71776f6ee373
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:06.837154
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2012

• Resource ID: b8d32d9f-ebe4-426d-bf50-a641a75eac04
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:11.828736
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2010

• Resource ID: b9f75444-c7c5-4129-b079-8219a0f1e0c1
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:57.777624
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2013

• Resource ID: bc5ab29d-1026-4398-8987-98aecf3438f7
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:51.123478
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2009

• Resource ID: bdc66812-e9fc-41f7-815f-b1bcdbe98b70
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:18.633693
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2005

• Resource ID: bec8ddef-95e2-4651-8fce-952bb791fbc1
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:59.606802
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2000

• Resource ID: c3e20b5e-7969-4722-a2f1-66ee1eea60fc
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:34.654586
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2004

• Resource ID: c47f3f29-1381-4640-a403-924c0f88fffc
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:58.299482
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 1999

• Resource ID: c69c3303-ce8e-4cd5-902f-f58beaf59951
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:27.889452
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr081999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2009

• Resource ID: c8de530e-11e7-4c2f-be4d-653bda866158
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:55.652009
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2002

• Resource ID: cabbdd86-4e02-47c0-906f-be53096248d4
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:24.429091
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2010

• Resource ID: cc09ee8a-f72b-49c8-b9b6-a7fc96c36115
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:17.690107
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2006

• Resource ID: cc8bc6bd-39f0-4a80-9b70-b248cf78439f
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:46.045830
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2010

• Resource ID: cdbc6bc8-abea-4fa4-8605-fd110a01c0a8
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:40.249727
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Aug 2009

• Resource ID: ce288774-3ff3-45c0-aeae-98eadc35d6fe
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:29.559257
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr082009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Aug.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2004

• Resource ID: ce2ae950-621d-47d3-8b06-6bfcf834dc89
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:18.118526
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2003

• Resource ID: ce6994ef-3cb3-482b-81c7-cfe5abd10d92
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:35.852910
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2007

• Resource ID: d055cc4c-ce14-4d38-99fe-17279e45a0d8
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:43.771454
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2013

• Resource ID: d0c917ca-9345-4bf3-bfe9-9ef76fec729d
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:08.148807
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2006

• Resource ID: d11fd0d1-e142-4f59-a7a6-df238122b57c
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:10.475569
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2008

• Resource ID: d1465475-d557-4cdf-be39-8355f9ab1c0d
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:01:22.766372
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072008.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2008.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2012

• Resource ID: d45da68b-dda4-41b3-b274-7847d8e9b3c2
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:18.431346
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092012.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2012.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2001

• Resource ID: d5001c37-8d11-4847-9456-a8d5019a2e16
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:51.826784
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2006

• Resource ID: d63ba39c-c884-499d-82cf-74317f24791f
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:59:22.351105
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042006.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2006.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 1999

• Resource ID: d7636f14-4827-4d7b-9d13-cc427e198632
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:30.242777
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr111999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2010

• Resource ID: d9503fe2-9fbf-4e30-9d29-afe1ecb59c5f
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:03:34.409458
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072010.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2010.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2000

• Resource ID: dafa8f6e-23e7-4737-8b30-3cf51ef5c34d
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:35.628413
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052000.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2000.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Apr 2011

• Resource ID: db8a950d-2c06-40b3-bab1-45f1cb201e65
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:27.774256
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr042011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Apr.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2003

• Resource ID: dbb84135-f2ca-4cb9-86ea-8c2a46774575
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:26.537720
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2011

• Resource ID: df55bd53-b999-46ca-b8b9-563846c7b2b3
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:04:21.557223
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2013

• Resource ID: dfa9047e-a8a4-4073-8786-934c32a90a4e
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:58.435913
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2001

• Resource ID: e3191ddc-4156-419d-a3a3-37fe0322f181
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:59.557504
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jun 2013

• Resource ID: e34182b1-5014-4949-8669-09678906cc16
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:07:22.283360
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr062013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jun.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jan 2013

• Resource ID: e3714a1d-9375-4ed3-b101-65dbf28899f8
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:06:47.519129
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr012013.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jan.2013.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Sep 2005

• Resource ID: e9ac82dc-7569-4cb0-a881-5b6ac95b7a8f
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:56.315352
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr092005.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Sep.2005.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2011

• Resource ID: eace6ecf-df1d-4d5e-99b6-01b4cc6c1380
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:19.396790
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) May 2009

• Resource ID: ebd7a0b2-c834-4248-b5f7-2095fe2f57de
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:13.434191
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr052009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in May.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2001

• Resource ID: ec1cae37-bec6-4ca3-997a-50729ea9b1c9
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:47.697078
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 1999

• Resource ID: eddc7b7f-5342-41eb-b6c6-bc89c6979f55
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:29.436187
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr101999.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.1999.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2002

• Resource ID: f04b0ba4-0da1-44bc-91c5-d7ddaf95c701
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:06.712466
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032002.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2002.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Nov 2009

• Resource ID: f1c4b6e3-3d44-4089-8889-717217447dc6
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:02:50.111481
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr112009.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Nov.2009.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2004

• Resource ID: f397b06f-18f3-4d45-ad70-32b8085fac28
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:58:12.305806
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072004.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2004.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Dec 2001

• Resource ID: f3b7bd67-5b88-4690-9b63-71641b2f12ff
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:01.242347
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr122001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Dec.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2001

• Resource ID: f4626092-d15f-44bb-952a-42d1374baca1
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:57.905618
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Oct 2011

• Resource ID: f9b69d93-0c23-49fc-bd91-0b87c80e7d73
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:05:06.206404
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr102011.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Oct.2011.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2007

• Resource ID: fa25ddd9-4c07-4771-851a-1b01af15c2a4
• Format: CSV
• Language: en
• Updated: 2025-08-04T17:00:24.870155
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072007.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2007.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Jul 2001

• Resource ID: fb6acf02-da56-408d-98fb-03a9541da298
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:53.282025
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr072001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Jul.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Feb 2001

• Resource ID: fdf30a91-fe8a-44f7-9f4e-06d95051a0a7
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:56:46.369409
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr022001.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Feb.2001.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Past record of Air Pollution Index (English) Mar 2003

• Resource ID: fe166ffe-1cfe-454c-84ef-895327e9a7e4
• Format: CSV
• Language: en
• Updated: 2025-08-04T16:57:31.229835
• Original URL: http://www.aqhi.gov.hk/api_history/download/hourly/eng/hr032003.csv

Hourly Air Pollution Index (API) at different Air Quality Monitoring stations in Mar.2003.

The API is a simple way of describing air pollution levels. In Hong Kong, the API converts air pollution data from several types of pollutants into a value ranging from 0 to 500. Since API has been replaced by AQHI on 30 December 2013, please refer to the [archive of API webpage](http://www.aqhi.gov.hk/en/related-websites/air-pollution-index.html), if you want to have the information of API.

The above external links lead to a collection of CSV files containing past hourly API data from July 1999 to December 2013.

The Air Pollution Index has been replaced by the Air Quality Health Index (AQHI) since 30 December 2013. At present, there are 3 roadside and 12 general stations reporting AQHI. Please refer to the [thematic page of AQHI](http://www.aqhi.gov.hk/en) for more information.

Document availability

Parsed specifications and data dictionaries: not available for this dataset. Document availability.