Pollutant and AQHI Distribution

(At 2024-05-21 01:00)

General Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Kwun Tong25.556.507.24.63
Sham Shui Po27.552.81.85.2-3
Kwai Chung23.
Tsuen Wan18.957.51.5346.43.5-3
Tseung Kwan O10.672.92.5300.117.611.13
Yuen Long13.668.22327.6-33
Tuen Mun26.845.63.1708.8643
Tung Chung9.768.60.4412.15.1-3
Tai Po14.864.72.22.4-3
Sha Tin19.662.
Tap Mun----1.6-3

Roadside Stations
Pollutant Concentrations(μg/m3)
Station NamesNO2O3SO2COPM10PM2.5AQHI
Causeway Bay21.868.21.3305.820.419.43
Mong Kok51.235.91.949265.33


(1) Time shown is in Hong Kong time.

(2) Concentration shown is in microgram per cubic metre (µg/m3).

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

(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.