The Local Air Quality Index - China
The Local Air Quality Index is a method used by the government and companies to communicate air quality in an understandable way.
How we calculate the air quality index - China
BreezoMeter uses an index called “AQI (CN)”
We take the average of each pollutant type according to local government definitions.
An official conversion table is used to convert average pollutant concentrations to AQI for each pollutant.
The final AQI is determined by taking the worst AQI among all pollutants. The worst pollutant being the dominant pollutant.
Index Health Categories
AQI (CN) represents air quality levels according to the following health categories:
Category
AQI
Excellent air quality
0 to 50
Good air quality
51 to 100
Light air pollution
101 to 150
Moderate air pollution
151 to 200
Heavy air pollution
201 to 300
Severe air pollution
301 to 500
Pollutant Type
Period
pm2.5
24h avg.
pm10
24h avg.
o3
1h or 8h avg.
so2
1h or 24h avg.
no2
1h or 24h avg.
co
1h or 24h avg.
Index Pollutant Types
The chart displays the pollutants that are part of the The following chart displays the pollutants that are part of the AQI (CN) calculation and the timeframe taken to average each pollutant type. :
Air Quality Indexes Around The Globe
Explore the local air quality indexes BreezoMeter uses in various countries.
