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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)
NO228.4PM2.511.2
SO23.0PM1018.2
O39.2
Air Quality Monitoring Stations Info
Kwai Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO221.1PM2.510.9
SO20.4PM1019.8
O37.0
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO229.1PM2.5-
SO22.2PM1033.9
O35.1
Air Quality Monitoring Stations Info
Tai Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO221.0PM2.58.0
SO21.3PM1017.6
O311.4
Air Quality Monitoring Stations Info
Tap Mun AQHI 1
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO213.5PM2.57.7
SO24.9PM1014.8
O314.2
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.510.0
SO2-PM1018.6
O3-
Air Quality Monitoring Stations Info
Tung Chung AQHI 1
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.56.4
SO2-PM1012.2
O3-
Air Quality Monitoring Stations Info
Yuen Long AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.510.0
SO2-PM1016.6
O3-
Air Quality Monitoring Stations Info
Causeway Bay AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO239.5PM2.512.3
SO22.3PM1024.4
O36.0
Air Quality Monitoring Stations Info
Central AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO234.7PM2.59.4
SO24.0PM1018.4
O33.6
Air Quality Monitoring Stations Info
Sha Tin AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO223.3PM2.58.5
SO26.2PM1017.6
O36.5
Air Quality Monitoring Stations Info
Kwun Tong AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO220.1PM2.57.8
SO25.0PM1012.4
O311.5
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO213.8PM2.54.7
SO24.2PM1012.0
O318.0
Air Quality Monitoring Stations Info
Eastern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO218.1PM2.55.1
SO20.7PM109.3
O328.6
Air Quality Monitoring Stations Info
Mong Kok AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO230.8PM2.510.3
SO22.2PM1019.4
O311.2
Air Quality Monitoring Stations Info
Tuen Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO217.2PM2.510.0
SO21.4PM1026.7
O320.1
Air Quality Monitoring Stations Info
Southern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO229.1PM2.53.6
SO24.4PM1011.2
O37.5
Air Quality Monitoring Stations Info
North AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO220.8PM2.513.3
SO21.5PM1023.2
O311.0
General Station
Roadside Station
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Last revision date: 16:07 01-12-2022