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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)
NO212.1PM2.56.1
SO21.3PM1016.8
O333.0
Air Quality Monitoring Stations Info
Kwai Chung AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO263.7PM2.510.8
SO26.1PM1026.4
O31.1
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO243.9PM2.510.4
SO23.1PM1022.5
O39.6
Air Quality Monitoring Stations Info
Tai Po AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO267.5PM2.516.9
SO25.1PM1028.5
O33.6
Air Quality Monitoring Stations Info
Tap Mun AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO211.9PM2.54.1
SO21.1PM109.0
O358.6
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO249.1PM2.511.5
SO27.6PM1021.4
O325.3
Air Quality Monitoring Stations Info
Tung Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO211.1PM2.59.5
SO21.0PM1021.0
O329.3
Air Quality Monitoring Stations Info
Yuen Long AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO228.7PM2.56.4
SO21.8PM1012.9
O322.2
Air Quality Monitoring Stations Info
Causeway Bay AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO266.2PM2.522.3
SO26.7PM1035.7
O38.6
Air Quality Monitoring Stations Info
Central AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO256.2PM2.515.1
SO24.9PM1025.3
O32.4
Air Quality Monitoring Stations Info
Sha Tin AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO220.7PM2.59.3
SO21.1PM1021.0
O329.7
Air Quality Monitoring Stations Info
Kwun Tong AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO237.0PM2.59.1
SO21.3PM1020.9
O312.5
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO228.1PM2.514.8
SO22.1PM1027.7
O319.5
Air Quality Monitoring Stations Info
Eastern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO221.5PM2.59.2
SO20.5PM1017.9
O337.6
Air Quality Monitoring Stations Info
Mong Kok AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO253.8PM2.512.8
SO24.2PM1024.7
O36.2
Air Quality Monitoring Stations Info
Tuen Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO240.6PM2.512.9
SO24.1PM1028.0
O311.0
Air Quality Monitoring Stations Info
Southern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.6PM2.59.7
SO21.0PM1020.7
O316.7
Air Quality Monitoring Stations Info
North AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO274.6PM2.514.6
SO24.0PM1021.4
O37.4
General Station
Roadside Station
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Last revision date: 23:07 26-04-2024