World's most polluted cities 2019 (PM2.5)
The most polluted cities according to data aggregated from over 60,000 data points.
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2019
NEW
World air quality report
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2019 Report - English
2019 World air quality report
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PM2.5 Legend 
WHO target
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
Unit: µg/m³
| Rank | City | 2019 AVG | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | 2018 AVG | 2017 AVG |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2254 |  Zurich, Switzerland | 10.9 | 11.8 | 20.9 | 12 | 17.3 | 8.6 | 8.6 | 9.3 | 8.3 | 7.2 | 7.6 | 10.6 | 8.9 | 11.2 | 10.4 |
