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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 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO233.7PM2.517.8
SO22.2PM1026.7
O385.1
Air Quality Monitoring Stations Info
Kwai Chung AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO255.1PM2.515.4
SO28.1PM1022.9
O357.4
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.513.0
SO2-PM1025.4
O3-
Air Quality Monitoring Stations Info
Tai Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO219.3PM2.516.4
SO24.9PM1022.0
O395.7
Air Quality Monitoring Stations Info
Tap Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO217.5PM2.517.3
SO29.4PM1025.8
O391.0
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO239.9PM2.514.0
SO25.0PM1016.8
O366.2
Air Quality Monitoring Stations Info
Tung Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO257.5PM2.521.5
SO29.8PM1033.8
O337.5
Air Quality Monitoring Stations Info
Yuen Long AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO239.0PM2.522.5
SO25.2PM1034.9
O361.2
Air Quality Monitoring Stations Info
Causeway Bay AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO285.7PM2.525.6
SO25.0PM1042.9
O325.9
Air Quality Monitoring Stations Info
Central AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.518.7
SO2-PM1028.6
O3-
Air Quality Monitoring Stations Info
Sha Tin AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.513.3
SO2-PM1019.8
O3-
Air Quality Monitoring Stations Info
Kwun Tong AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO260.9PM2.522.7
SO26.2PM1028.3
O356.4
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO213.5PM2.510.3
SO25.1PM1019.4
O396.6
Air Quality Monitoring Stations Info
Eastern AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO242.7PM2.519.4
SO21.7PM1033.0
O377.5
Air Quality Monitoring Stations Info
Mong Kok AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO259.9PM2.515.9
SO23.1PM1027.3
O345.6
Air Quality Monitoring Stations Info
Tuen Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO252.8PM2.526.9
SO23.4PM1040.9
O341.6
Air Quality Monitoring Stations Info
Southern AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO225.4PM2.59.3
SO21.5PM1025.4
O389.4
Air Quality Monitoring Stations Info
North AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO236.8PM2.518.1
SO24.3PM1027.0
O372.1
General Station
Roadside Station
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Last revision date: 21:07 24-01-2022