Welcome to Environmental Protection Department Air Quality Health Index Website

(At 2023-12-04 11:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong77.318.34.453.437.93
Sham Shui Po---52.336.93
Kwai Chung87.617.513.852.436.34
Tsuen Wan71.621.47.9678.649.736.43
Tseung Kwan O27.552.74.3514.339.430.23
Yuen Long41.744.38.4815.647.732.23
Tuen Mun54.428.74.7720.758413
Tung Chung4632.28.269430.214.13
Tai Po35.347.43.441.528.73
Sha Tin30.458.94.143.432.53
Tap Mun13.752.13.8595.331.923.43

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay97.5126.6936.273.549.94
Mong Kok85.628.76655.849.536.94


(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: 11:07 04-12-2023