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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)
NO220.3PM2.54.9
SO26.6PM105.2
O341.2
Air Quality Monitoring Stations Info
Kwai Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO252.8PM2.57.8
SO221.9PM109.7
O33.3
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO248.5PM2.54.9
SO211.4PM108.3
O311.8
Air Quality Monitoring Stations Info
Tai Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO241.1PM2.58.9
SO22.8PM1011.3
O38.7
Air Quality Monitoring Stations Info
Tap Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO2-PM2.51.6
SO2-PM103.3
O3-
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO227.5PM2.53.3
SO28.5PM106.7
O317.3
Air Quality Monitoring Stations Info
Tung Chung AQHI 1
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO211.4PM2.5-
SO24.0PM102.6
O326.8
Air Quality Monitoring Stations Info
Yuen Long AQHI 1
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO214.5PM2.53.9
SO25.4PM105.2
O317.5
Air Quality Monitoring Stations Info
Causeway Bay AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO233.2PM2.512.6
SO22.5PM1019.3
O325.7
Air Quality Monitoring Stations Info
Central AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO245.7PM2.54.8
SO27.1PM105.7
O39.9
Air Quality Monitoring Stations Info
Sha Tin AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO238.9PM2.54.2
SO212.0PM105.6
O313.1
Air Quality Monitoring Stations Info
Kwun Tong AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.6PM2.53.0
SO28.9PM105.3
O321.9
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO231.5PM2.57.6
SO25.1PM109.9
O319.2
Air Quality Monitoring Stations Info
Eastern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO216.8PM2.53.9
SO22.2PM106.4
O347.2
Air Quality Monitoring Stations Info
Mong Kok AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO250.3PM2.54.4
SO26.3PM106.6
O34.6
Air Quality Monitoring Stations Info
Tuen Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO226.2PM2.56.1
SO23.6PM107.1
O315.0
Air Quality Monitoring Stations Info
Southern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO225.3PM2.5-
SO23.3PM103.6
O315.1
Air Quality Monitoring Stations Info
North AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO236.8PM2.54.4
SO26.1PM1012.9
O312.1
General Station
Roadside Station
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Last revision date: 19:07 14-08-2022