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Pollutant and AQHI Distribution

(At 2022-06-28 03:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong20.833.75.39.842
Sham Shui Po17.532.65.50.6-2
Kwai Chung23.117.49.621.82
Tsuen Wan24.112.79.7251.65.84.52
Tseung Kwan O18.533.60.3380.79.752
Yuen Long39.265.3421.33.6-2
Tuen Mun18.920.42.7336.874.92
Tung Chung9.5123.4259.32.3-1
Tai Po-24.7-4.13.32
Sha Tin15.327.
Tap Mun132.69.1390.22.821

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay28.416.42.8391.56.14.72
Mong Kok29.5-2.9620.16.35.42


(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.