About AQHI - How is the AQHI calculated and reported?

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How is the AQHI calculated and reported?

AQHIs are calculated based on the cumulative health risk attributable to the 3-hour moving average concentrations of four air pollutants namely, ozone (O3), nitrogen dioxide (NO2), sulphur dioxide (SO2) and particulate matter (PM2.5/ PM10). The risk factors of each pollutant were obtained from local health studies. aqms.jpg
The map below shows the locations of air quality monitoring stations.

Air Quality Monitoring Stations Info
Central/Western AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 12.0 PM2.5 5.6
SO2 3.9 PM10 14.5
O3 29.6
Air Quality Monitoring Stations Info
Kwai Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 47.5 PM2.5 -
SO2 9.3 PM10 -
O3 5.9
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 23.1 PM2.5 5.7
SO2 3.7 PM10 19.8
O3 23.6
Air Quality Monitoring Stations Info
Tai Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 14.4 PM2.5 5.4
SO2 - PM10 12.2
O3 29.5
Air Quality Monitoring Stations Info
Tap Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 4.0 PM2.5 5.9
SO2 4.1 PM10 12.9
O3 38.4
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 26.7 PM2.5 5.9
SO2 6.4 PM10 17.2
O3 13.4
Air Quality Monitoring Stations Info
Tung Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 5.2 PM2.5 2.6
SO2 1.5 PM10 12.2
O3 33.0
Air Quality Monitoring Stations Info
Yuen Long AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 14.0 PM2.5 9.4
SO2 3.1 PM10 17.7
O3 23.3
Air Quality Monitoring Stations Info
Causeway Bay AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 33.5 PM2.5 12.3
SO2 4.7 PM10 27.2
O3 17.2
Air Quality Monitoring Stations Info
Central AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 32.7 PM2.5 3.7
SO2 3.0 PM10 13.5
O3 24.8
Air Quality Monitoring Stations Info
Sha Tin AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 16.1 PM2.5 2.3
SO2 5.3 PM10 11.4
O3 25.0
Air Quality Monitoring Stations Info
Kwun Tong AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 35.4 PM2.5 10.0
SO2 5.1 PM10 26.0
O3 13.8
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 16.4 PM2.5 8.0
SO2 4.5 PM10 20.2
O3 25.7
Air Quality Monitoring Stations Info
Eastern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 14.0 PM2.5 3.0
SO2 1.5 PM10 17.5
O3 16.2
Air Quality Monitoring Stations Info
Mong Kok AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 67.7 PM2.5 9.5
SO2 5.4 PM10 20.0
O3 6.7
Air Quality Monitoring Stations Info
Tuen Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 11.6 PM2.5 9.1
SO2 2.3 PM10 24.0
O3 25.9
Air Quality Monitoring Stations Info
Southern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 18.6 PM2.5 8.9
SO2 3.2 PM10 23.0
O3 28.6
Air Quality Monitoring Stations Info
North AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2 13.3 PM2.5 7.2
SO2 5.8 PM10 14.5
O3 31.1
General Station
Roadside Station
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Last revision date:21:07 11-07-2020