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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 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO243.5PM2.522.7
SO23.2PM1034.3
O3115.6
Air Quality Monitoring Stations Info
Kwai Chung AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO273.5PM2.524.7
SO23.1PM1036.6
O386.9
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO236.2PM2.519.0
SO21.7PM1031.7
O3122.7
Air Quality Monitoring Stations Info
Tai Po AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO225.2PM2.524.0
SO23.5PM1035.6
O3117.9
Air Quality Monitoring Stations Info
Tap Mun AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO25.2PM2.519.3
SO26.8PM1028.4
O3113.6
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.5PM2.524.9
SO25.0PM1034.5
O3112.8
Air Quality Monitoring Stations Info
Tung Chung AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO236.3PM2.519.3
SO29.7PM1029.4
O3115.7
Air Quality Monitoring Stations Info
Yuen Long AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO248.5PM2.520.4
SO29.7PM1032.8
O396.2
Air Quality Monitoring Stations Info
Causeway Bay AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2136.1PM2.537.9
SO24.8PM1053.2
O328.7
Air Quality Monitoring Stations Info
Central AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2150.2PM2.523.0
SO26.8PM1036.3
O322.4
Air Quality Monitoring Stations Info
Sha Tin AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO222.3PM2.5-
SO22.1PM10-
O3126.4
Air Quality Monitoring Stations Info
Kwun Tong AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO275.0PM2.520.0
SO24.0PM1033.2
O392.4
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO211.8PM2.516.0
SO22.9PM1025.6
O3135.7
Air Quality Monitoring Stations Info
Eastern AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO244.8PM2.519.3
SO21.4PM1036.0
O3118.2
Air Quality Monitoring Stations Info
Mong Kok AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.5-
SO2-PM10-
O3-
Air Quality Monitoring Stations Info
Tuen Mun AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO243.4PM2.522.1
SO25.7PM1039.2
O399.3
Air Quality Monitoring Stations Info
Southern AQHI 5
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO227.4PM2.523.0
SO22.6PM1032.3
O3142.7
Air Quality Monitoring Stations Info
North AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO244.9PM2.524.4
SO23.2PM1035.7
O398.7
General Station
Roadside Station
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Last revision date: 02:07 26-10-2021