World's most polluted cities 2020 (PM2.5)
The most polluted cities according to data aggregated from over 80,000 data points.
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2020 Report - English
2020 World air quality report
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PM2.5 Legend 
Unit: µg/m³
| Rank | City | 2020 AVG | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | 2019 AVG | 2018 AVG | 2017 AVG |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Gitanyow, Canada | 17.9 | 34.8 | 24 | 17.5 | 11.3 | 5 | 3.2 | 3.5 | 4.7 | 7.6 | 13.7 | 26.9 | 36.6 | - | - | - |
| 2 | Clearwater, Canada | 15.5 | 26.5 | 21.3 | 15.7 | 7.7 | 3 | 2.8 | 5.2 | 5.8 | 13.3 | 15.6 | 23.7 | 31.1 | 13.9 | - | - |
| 3 | Qualicum Beach, Canada | 12.6 | 13 | 14.8 | 13.6 | 8.4 | 4.9 | 3.6 | 3.4 | 4 | 30.3 | 16.6 | 15.7 | 18 | 10 | - | - |
| 4 | Grand Forks, Canada | 12.2 | 12.6 | 13.8 | 6.9 | 5.2 | 5 | 4.1 | 5.3 | 6.1 | 54.8 | 10.4 | 12.9 | 11.5 | 10.6 | - | - |
| 5 | Golden, Canada | 11.5 | 11.3 | 15.3 | 8 | 5.1 | 3.6 | 2.9 | 4.2 | 6.2 | 19.9 | 15.5 | 17.9 | 22.3 | - | - | - |
| 6 | Castlegar, Canada | 10.8 | 7.4 | 7.9 | 6.9 | 5 | 4 | 4 | 4.5 | 5.8 | 56 | 8.7 | 10.8 | 8.2 | - | - | - |
| 7 | Hazelton, Canada | 10.7 | 19.5 | 16.6 | 13.2 | 10.9 | 3.6 | 2.8 | 3.5 | 4 | 6.1 | 9.9 | 14.8 | 12.6 | 13.5 | - | - |
| 8 | Sooke, Canada | 10.6 | 11.1 | 10.9 | 12.5 | 8.1 | 4.2 | 2.8 | 4.4 | 4.8 | 24.9 | 11.3 | 13.6 | 11.7 | 8.8 | - | - |
| 9 | Mont-Royal, Canada | 10.5 | 13.6 | 17.9 | 11 | 8.3 | 8.9 | 10.8 | 8.9 | 8.2 | 7.4 | 9.2 | 13.5 | 9 | 13 | - | - |
| 10 | Laval, Canada | 10.1 | 15.7 | 17.9 | 9.6 | 6.8 | 6.1 | 9.9 | 9.2 | 7 | 5.1 | 6.4 | 15.1 | 13 | 9.4 | - | - |
| 11 | Longueuil, Canada | 9.9 | 15.8 | 18.1 | 9.6 | 6.4 | 5.2 | 8.8 | 9.2 | 8.2 | 5.9 | 5.7 | 12.7 | 11.9 | 9.2 | - | - |
| 12 | Quebec, Canada | 9.9 | 12.8 | 19.4 | 11 | 6.6 | 6.4 | 8.4 | 8.4 | 7.7 | 7.3 | 7 | 11.8 | 11.9 | 8.3 | 8.9 | 9 |
| 13 | Cranbrook, Canada | 9.7 | 10.4 | 8.5 | 7.6 | 5.1 | 3.1 | 2.1 | 4.4 | 6.1 | 29.1 | 10.6 | 11.3 | 14.2 | 8.9 | - | - |
| 14 | Chemainus, Canada | 9.5 | 8.7 | 11 | 9 | 6.9 | 3.8 | 3.4 | 4 | 4.6 | 22.8 | 11.9 | 10.6 | 12.8 | 9.1 | - | - |
| 15 | Mill Bay, Canada | 9.5 | 5.6 | 9.5 | 9.6 | 6.1 | 4 | 2.8 | 3.8 | 4.7 | 21.7 | 12.3 | 12.5 | 14.1 | 9.1 | - | - |
| 16 | Vanderhoof, Canada | 9.5 | 14.4 | 10.6 | 8.7 | 8 | 4.1 | 4.2 | 6.7 | 7.1 | 7.5 | 12.7 | 12.5 | 11.4 | - | - | - |
| 17 | Montreal, Canada | 9.5 | 12.3 | 15.6 | 9.3 | 7.3 | 7.4 | 9.8 | 8.7 | 7.7 | 7.5 | 6.6 | 11.8 | 10.1 | 10 | 7 | 6.8 |
| 18 | Scotch Creek, Canada | 9.4 | 9.6 | 10.6 | 12.8 | 6.2 | 4 | 5.4 | 8.3 | 7.1 | 17.4 | 11.8 | 10.4 | 8.8 | 8.5 | - | - |
| 19 | Hamilton, Canada | 9.4 | 10.9 | 10.9 | 9.2 | 7.9 | 9 | 9.5 | 11.3 | 9.2 | 7.7 | 5.8 | 11 | 10.7 | 10.1 | 8.9 | 8.3 |
| 20 | Courtenay, Canada | 9.2 | 8.6 | 12.3 | 8.2 | 5.8 | 2.9 | 2.7 | 3.1 | 3.8 | 24.2 | 12.3 | 11.3 | 12.4 | 8.6 | - | - |
| 21 | Parksville, Canada | 9 | 8 | 12.2 | 10.8 | 7.6 | 4.7 | 4.3 | 3.7 | 4.1 | 18.2 | 11.2 | 11.1 | 12.3 | 9 | - | - |
| 22 | Barrière, Canada | 8.7 | 10.9 | 10.5 | 7.6 | 5.6 | 4.1 | 3.5 | 5.3 | 4.8 | 13.1 | 12.1 | 12.4 | 10.4 | 8.2 | - | - |
| 23 | Campbell River, Canada | 8.7 | 5.7 | 8.8 | 6.6 | 5.3 | 5.1 | 4.2 | 5 | 5.4 | 26.3 | 9.6 | 8.6 | 10.6 | - | - | - |
| 24 | Valemount, Canada | 8.5 | 10.7 | 9.7 | 12.7 | 9.5 | 5.9 | 3.8 | 7.4 | 6.7 | 10.8 | 10 | 8.3 | 6.1 | - | - | - |
| 25 | Sainte-Anne-de-Bellevue, Canada | 8.5 | 9.8 | 12.6 | 7.6 | 8.5 | 7.2 | 9.9 | 9.1 | 7.1 | 5.5 | 5.9 | 10.2 | 8.3 | 8.2 | 6.3 | 6.3 |
| 26 | Houston, Canada | 8.4 | 14.6 | 14.6 | 9.7 | 6.7 | 4.6 | 3.3 | 4.6 | 4.5 | 5.5 | 10 | 10.9 | 10.7 | 12.8 | - | - |
| 27 | Madeira Park, Canada | 8.4 | 6.8 | 10.1 | 10.3 | 7.1 | 3.9 | 2.7 | 4.2 | 5.1 | 20.4 | 8.7 | 9.7 | 11.1 | 8.5 | - | - |
| 28 | New Westminster, Canada | 8.3 | 4.1 | 7.2 | 6.1 | 5.7 | 4.9 | 4.8 | 5.9 | 6.5 | 30.6 | 10.1 | 6.2 | 6.7 | 7.3 | - | - |
| 29 | Cobble Hill, Canada | 8.2 | 6.7 | 8.1 | 7.9 | 5.3 | 3.8 | 2.9 | 3.7 | 4.4 | 21.7 | 11 | 10 | 9 | 9.2 | - | - |
| 30 | Duncan, Canada | 8.2 | 8.1 | 9.1 | 7.7 | 4.9 | 3.1 | 2.6 | 3.3 | 4.2 | 21.6 | 10.7 | 9.9 | 12.5 | 8.5 | - | - |
| 31 | Sointula, Canada | 8.1 | 7.6 | 10 | 9.3 | 5.2 | 3.9 | 2.5 | 3.7 | 2.2 | 15.5 | 9.6 | 9.7 | 9.7 | 7.6 | - | - |
| 32 | Vancouver, Canada | 8.1 | 4.1 | 6 | 5.7 | 5.7 | 4.6 | 4.4 | 5.7 | 6.2 | 31.6 | 8.7 | 7.2 | 7.9 | 6.1 | 6.3 | 6.6 |
| 33 | Windsor, Canada | 8.1 | 8.6 | 8.7 | 8.5 | 7.6 | 6.3 | 7.9 | 8.6 | 7.6 | 7.6 | 6.6 | 8.4 | 10.8 | 8.2 | 8.6 | 8 |
| 34 | Port Alberni, Canada | 8 | 9.7 | 12.4 | 8.5 | 6.1 | 4.5 | 3.9 | 4.6 | 5 | 9.5 | 9.1 | 10.9 | 11.6 | - | - | - |
| 35 | Gatineau, Canada | 8 | 10.9 | 11.9 | 7.9 | 4.8 | 5 | 7.3 | 7.7 | 6.2 | 4.8 | 5.1 | 12.5 | 11.2 | 7.8 | - | - |
| 36 | Bainsville, Canada | 7.9 | 11.2 | 13.8 | 7.1 | 4.9 | 6.2 | 9 | 8.7 | 7.1 | 5 | 3.7 | 9.6 | 8.8 | 8.2 | - | - |
| 37 | Abbotsford, Canada | 7.8 | 3.2 | 6.1 | 7.7 | 6.9 | 4.8 | 4.5 | 6.3 | 6.9 | 26.2 | 10.1 | 5.4 | 5.7 | 7.5 | 7.2 | 6.1 |
| 38 | Vernon, Canada | 7.8 | 10.3 | 11.3 | 8.1 | 6 | 4 | 3.7 | 4.7 | 5.1 | 11.9 | 9.9 | 11.3 | 8.5 | 9.1 | - | - |
| 39 | Regina, Canada | 7.8 | 6 | 6.5 | 6.2 | 6.3 | 6.9 | 5.1 | 6.8 | 10 | 9.4 | 6.6 | 12.1 | 9.4 | 8.4 | - | - |
| 40 | Gibbons, Canada | 7.7 | 13.1 | 7.2 | 7 | 5.7 | 6.2 | 6.3 | 6.5 | 6.4 | 8.3 | 6.6 | 10 | 9.2 | 8.7 | - | - |
| 41 | Crofton, Canada | 7.7 | 4.1 | 5.5 | 5.8 | 5.3 | 4.2 | 3.5 | 3.8 | 4.4 | 32.7 | 6.8 | 4.4 | 4.7 | - | - | - |
| 42 | Kelowna, Canada | 7.7 | 7.6 | 6.5 | 3.9 | 3.4 | 2.9 | 2.8 | 4.5 | 5.2 | 33.7 | 9.9 | 8.2 | 7.4 | 7.1 | - | - |
| 43 | Quesnel, Canada | 7.7 | 9.6 | 8.1 | 8.4 | 7.1 | 5.2 | 5.7 | 6.8 | 6.1 | 8.9 | 9 | 7.4 | 8.9 | 9.8 | - | - |
| 44 | Dobie, Canada | 7.7 | 12 | 8.5 | 10.6 | 5.1 | 6.5 | 9.1 | 7.6 | 5.6 | 5.6 | 3.9 | 10.6 | - | 7.7 | - | - |
| 45 | Burns Lake, Canada | 7.5 | 11.5 | 10.1 | 9.3 | 6.9 | 4.9 | 2.7 | 3.3 | 3.4 | 5.7 | 10.4 | 9.6 | 9.7 | 10.9 | - | - |
| 46 | Smithers, Canada | 7.4 | 12.6 | 12 | 7.6 | 5.7 | 3.8 | 2.8 | 3.3 | 3.4 | 5.4 | 10.8 | 9.8 | 10.7 | 11.6 | - | - |
| 47 | Burlington, Canada | 7.4 | 6.5 | 6.7 | 6.3 | 5.7 | 6.2 | 7.5 | 9.2 | 8.3 | 7.2 | 5.8 | 9.5 | 9.6 | 6.8 | 7.5 | 7.4 |
| 48 | Champlain, Canada | 7.4 | 9.1 | 15.8 | 10.6 | 4.5 | 5.4 | 8.6 | 7.8 | 4.4 | 3.7 | 4.7 | 8.8 | 6.2 | 6.9 | - | - |
| 49 | Prince Albert, Canada | 7.4 | 5.3 | 6.5 | 6.2 | 6 | 6.6 | 4.6 | 6 | 6.9 | 7.9 | 6.2 | 10.1 | 12.3 | - | - | - |
| 50 | Ladysmith, Canada | 7.3 | 5.3 | 7.2 | 6.1 | 4.6 | 3.5 | 3 | 3.6 | 4.1 | 22.2 | 10 | 7.7 | 8.5 | 6.7 | - | - |
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