| Characteristic | Share of days per category |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
September 2015
Region
China
Survey time period
April 2008 to June 2015
Supplementary notes
The Air Quality Index (AQI) reports daily air quality and is divided into six categories: good, moderate, unhealthy for sensitive groups, unhealthy, very unhealthy, hazardous.
Measures for PM2.5 concentration are taken in front of the U.S. embassy building in Beijing.
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