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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)
NO231.6PM2.51.5
SO24.4PM103.4
O326.7
Air Quality Monitoring Stations Info
Kwai Chung AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO261.2PM2.58.4
SO27.7PM1015.1
O39.8
Air Quality Monitoring Stations Info
Sham Shui Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO251.9PM2.58.6
SO210.8PM1014.6
O39.8
Air Quality Monitoring Stations Info
Tai Po AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO225.9PM2.53.3
SO23.5PM107.4
O326.7
Air Quality Monitoring Stations Info
Tap Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO212.6PM2.52.8
SO21.9PM106.0
O329.0
Air Quality Monitoring Stations Info
Tsuen Wan AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO228.2PM2.54.3
SO24.9PM106.3
O324.0
Air Quality Monitoring Stations Info
Tung Chung AQHI 1
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO229.9PM2.55.6
SO26.3PM108.0
O315.7
Air Quality Monitoring Stations Info
Yuen Long AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO227.5PM2.54.1
SO27.8PM109.0
O37.0
Air Quality Monitoring Stations Info
Causeway Bay AQHI 3
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO278.7PM2.510.0
SO26.9PM1016.6
O39.9
Air Quality Monitoring Stations Info
Central AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO260.4PM2.5-
SO26.6PM10-
O34.3
Air Quality Monitoring Stations Info
Sha Tin AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO230.5PM2.54.7
SO23.4PM109.9
O314.7
Air Quality Monitoring Stations Info
Kwun Tong AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO256.7PM2.56.6
SO27.8PM1012.6
O36.7
Air Quality Monitoring Stations Info
Tseung Kwan O AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO229.6PM2.5-
SO21.4PM109.4
O324.0
Air Quality Monitoring Stations Info
Eastern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO234.5PM2.54.8
SO21.9PM107.1
O329.5
Air Quality Monitoring Stations Info
Mong Kok AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO266.1PM2.55.3
SO210.5PM1011.4
O38.0
Air Quality Monitoring Stations Info
Tuen Mun AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO235.8PM2.56.2
SO24.1PM1016.1
O323.6
Air Quality Monitoring Stations Info
Southern AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO236.2PM2.54.9
SO23.9PM108.0
O327.0
Air Quality Monitoring Stations Info
North AQHI 2
Past 24 hrsConcentration / AQHI
Hourly concentration (ug/m3)
NO224.8PM2.57.7
SO22.3PM1023.7
O325.6
General Station
Roadside Station
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Last revision date: 06:08 26-09-2023