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Pollutant and AQHI Distribution

(At 2023-09-23 04:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong20.960.
Sham Shui Po---14.811.43
Kwai Chung15.560.94.615.311.53
Tsuen Wan16.847.44.8549.614.5123
Tseung Kwan O775.10.791.616.813.53
Yuen Long27.938.45.975918.715.33
Tuen Mun26.749.62.2364.818.918.73
Tung Chung10.346.25.3348.213.210.13
Tai Po9.957.22.913.810.63
Sha Tin2729.3218.813.23
Tap Mun2.823.40.7523.8138.52

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay15.765.21.7230.822.216.43
Mong Kok21.663.54.560311.87.73


(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.