(At 2023-03-23 05:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong11.332.45.81812.62
Sham Shui Po---16.212.82*
Kwai Chung422.913.219.813.52
Tsuen Wan30.411.77.923018.512.12
Tseung Kwan O22.124.22.1115.817.915.52
Yuen Long16.426.44645.916.412.22
Tuen Mun14.233.62.3479.126.1182
Tung Chung5410.340911.48.32
Tai Po17.434.
Sha Tin10.833.52.215.711.72
Tap Mun8.433.54.3326.728.215.22

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay19.129.93.910225.415.12
Mong Kok28.327.32.3386.816.512.52


(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: 05:07 23-03-2023