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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 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.532.0
SO2-PM1038.5
O348.4
Air Quality Monitoring Stations Info
Kwai Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO237.8PM2.533.3
SO23.2PM1037.9
O324.0
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO218.6PM2.535.8
SO22.4PM1039.1
O339.5
Air Quality Monitoring Stations Info
Tai Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO213.7PM2.535.2
SO23.6PM1039.9
O344.7
Air Quality Monitoring Stations Info
Tap Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO24.8PM2.525.9
SO21.5PM1028.8
O351.8
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.536.6
SO2-PM1039.2
O3-
Air Quality Monitoring Stations Info
Tung Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.530.2
SO2-PM1031.8
O3-
Air Quality Monitoring Stations Info
Yuen Long AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.534.2
SO2-PM1037.3
O3-
Air Quality Monitoring Stations Info
Causeway Bay AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO241.1PM2.547.4
SO24.9PM1060.0
O325.1
Air Quality Monitoring Stations Info
Central AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO237.2PM2.539.5
SO23.0PM1044.4
O321.2
Air Quality Monitoring Stations Info
Sha Tin AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO26.7PM2.533.9
SO21.9PM1038.5
O356.2
Air Quality Monitoring Stations Info
Kwun Tong AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO233.0PM2.536.7
SO26.3PM1040.3
O317.3
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.4PM2.548.0
SO24.5PM1049.0
O317.3
Air Quality Monitoring Stations Info
Eastern AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO224.8PM2.539.3
SO22.4PM1043.5
O337.8
Air Quality Monitoring Stations Info
Mong Kok AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO241.1PM2.537.8
SO23.7PM1041.7
O322.9
Air Quality Monitoring Stations Info
Tuen Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO211.8PM2.5-
SO24.0PM1046.0
O345.9
Air Quality Monitoring Stations Info
Southern AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO229.8PM2.533.8
SO25.6PM1040.1
O326.6
Air Quality Monitoring Stations Info
North AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO28.1PM2.5-
SO21.5PM1029.5
O357.3
General Station
Roadside Station
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Last revision date: 04:08 14-04-2024