Air Quality Index of Beijing (2014/04/14-2015/06/09)

Hourly Data

Click on hourly data to see index of each pollution substance

Air Quality Index and Health Implications

AQI Calculation

As indicated here, the general AQI is the max of IAQIs, which is quality index for each pollution substance including SO2,, NO2, CO, O3, PM10, PM2.5.

data source:Air Epmap

related document: Wikipedia