Welcome to Environmental Protection Department Air Quality Health Index Website

(At 2023-11-29 23:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong32.5117.81.651.925.86
Sham Shui Po50.6973.250.9276
Kwai Chung28.4121851.1275
Tsuen Wan51.697.96.8939.852.330.15
Tseung Kwan O16.6133.54.5360.253.7226
Yuen Long7639.68.2943.554.429.85
Tuen Mun47.977.84.3623.955.937.95
Tung Chung42.687.78589.8--5*
Tai Po32.4109.43.656.832.26
Sha Tin32.1114.84.650.2266
Tap Mun11.1101.52359.344.226.35

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay102.651.15.8590.364.535.96
Mong Kok86.877.26.2535.351.826.86


(1) Time shown is in Hong Kong time.

(2) NO2 - nitrogen dioxide, O3 - ozone,
     SO2 - sulphur dioxide, CO - carbon monoxide,
     PM10 - respirable suspended particulates,
     PM2.5 - fine suspended particulates

(3) Concentration shown is in µg/m3.

(4) The Pollutant concentration and AQHI information are based on real time data taken directly from EPD's Air Quality Monitoring Network.

(5) In case of equipment or station suspension due to repair and maintenance, the data collection for calculation of AQHI at station will be affected, the data of similar stations will then be adopted. Such AQHI will be shown with an asterisk.

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Last revision date: 23:07 29-11-2023