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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)
NO231.4PM2.514.7
SO24.7PM1021.6
O386.3
Air Quality Monitoring Stations Info
Kwai Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO232.4PM2.512.0
SO25.0PM1016.3
O374.2
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO255.6PM2.58.1
SO24.7PM1016.8
O353.4
Air Quality Monitoring Stations Info
Tai Po AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO219.3PM2.58.2
SO21.1PM1011.8
O391.1
Air Quality Monitoring Stations Info
Tap Mun AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO23.9PM2.57.6
SO27.1PM1014.3
O3101.9
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.1PM2.513.2
SO26.0PM1018.6
O367.0
Air Quality Monitoring Stations Info
Tung Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO217.4PM2.514.4
SO22.4PM1018.9
O373.3
Air Quality Monitoring Stations Info
Yuen Long AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO223.9PM2.510.9
SO2-PM1014.8
O370.5
Air Quality Monitoring Stations Info
Causeway Bay AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO280.9PM2.522.8
SO22.6PM1035.9
O331.8
Air Quality Monitoring Stations Info
Central AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO260.7PM2.516.9
SO21.1PM1022.2
O360.9
Air Quality Monitoring Stations Info
Sha Tin AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO214.1PM2.511.8
SO26.5PM1015.9
O386.0
Air Quality Monitoring Stations Info
Kwun Tong AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO258.4PM2.515.1
SO22.0PM1028.1
O358.4
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO29.6PM2.57.8
SO20.0PM1012.8
O3103.1
Air Quality Monitoring Stations Info
Eastern AQHI 4
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO249.9PM2.514.6
SO20.4PM1022.5
O376.2
Air Quality Monitoring Stations Info
Mong Kok AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO285.9PM2.521.4
SO23.5PM1030.1
O316.2
Air Quality Monitoring Stations Info
Tuen Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO215.1PM2.513.0
SO21.6PM1020.0
O372.6
Air Quality Monitoring Stations Info
Southern AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO225.2PM2.5-
SO23.7PM1011.7
O382.0
Air Quality Monitoring Stations Info
North AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO223.4PM2.58.0
SO23.8PM1012.6
O378.2
General Station
Roadside Station
Last revision date: 22:07 26-05-2022