BreezoMeter uses an index called “AQHI (HK)”
We take the average of each pollutant type according to local government definitions.
A scientific formula is used to calculate the AQHI for Hong Kong based on 4 different pollutants (PM2.5/PM10, O3, NO2 and SO2).
AQHI (HK) represents air quality levels according to the following health categories:
Low air pollution
1 to 3
Moderate air pollution
4 to 6
High air pollution
Very high air pollution
8 to 10
Serious air pollution
The chart displays the pollutants that are part of the The following chart displays the pollutants that are part of the AQHI (HK) calculation and the timeframe taken to average each pollutant type. :
Explore the local air quality indexes BreezoMeter uses in various countries.