2017-2025
World's most polluted cities
The most polluted cities according to data aggregated from over 80,000 data points.
2025
World Air Quality Report
2025
World Air Quality Report
PM2.5 legend
0-5Meets WHO guideline
5.1-10Exceeds by 1 to 2 times
10.1-15Exceeds by 2 to 3 times
15.1-25Exceeds by 3 to 5 times
25.1-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
| Rank | City | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8665 |  Mojave USA | 4.4 | 4.6 | 5.6 | 5.6 | 8.6 | -- | 6.7 | 7.8 | 6.1 |
| 8666 | Orinda USA | 4.4 | 4.1 | 5.4 | 6.2 | 7.4 | 10.9 | 5.6 | -- | -- |
| 8667 | San Marcos USA | 4.4 | 4.6 | 6.5 | 5.4 | 9.9 | -- | -- | -- | -- |
| 8668 | St. Helena USA | 4.4 | 3.9 | 4.6 | 4 | 6.5 | 13.9 | 6.1 | -- | -- |
| 8669 | Sunnyside-Tahoe City USA | 4.4 | 4.6 | -- | -- | -- | -- | -- | -- | -- |
| 8670 | Woodlands USA | 4.4 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 8671 | Aspen USA | 4.4 | 3.9 | 2.8 | 2.5 | 5.9 | 6.3 | 3.9 | -- | -- |
| 8672 | Ignacio USA | 4.4 | 4.4 | 5.6 | 3.9 | 5.3 | -- | -- | -- | -- |
| 8673 | Mancos USA | 4.4 | 4.1 | 5.3 | -- | -- | -- | -- | -- | -- |
| 8674 | Loxahatchee Groves USA | 4.4 | 4.5 | 3.5 | -- | -- | -- | -- | -- | -- |
| 8675 | Palmetto USA | 4.4 | 4.6 | 5.9 | 3 | 6.5 | -- | -- | -- | -- |
| 8676 | Kailua USA | 4.4 | 3 | 1.8 | -- | -- | -- | -- | -- | -- |
| 8677 | Kilauea USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8678 | Ketchum USA | 4.4 | 7.3 | 4 | 5.8 | 10.1 | 6.3 | 4.3 | 5 | 6.3 |
| 8679 | Marblehead USA | 4.4 | 4.4 | 7.2 | 6.1 | -- | -- | -- | -- | -- |
| 8680 | Anaconda USA | 4.4 | 16.5 | 5.6 | 11.6 | 23.5 | -- | -- | -- | -- |
| 8681 | Hardin USA | 4.4 | 5.8 | 6.3 | 6 | 13.4 | -- | -- | -- | -- |
| 8682 | Boulder City USA | 4.4 | 4.5 | 3.9 | 7.3 | 5.9 | 8 | -- | -- | -- |
| 8683 | Owyhee USA | 4.4 | 12.8 | -- | -- | -- | -- | -- | -- | -- |
| 8684 | Washoe USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8685 | Mora USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8686 | Eldred USA | 4.4 | 4.4 | 3.2 | 4.7 | -- | -- | -- | -- | -- |
| 8687 | Transylvania USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8688 | Junction City USA | 4.4 | 4.3 | 6.1 | 6.9 | 5.3 | 13.7 | 6.3 | -- | -- |
| 8689 | Mapleton USA | 4.4 | 6.3 | -- | -- | -- | -- | -- | -- | -- |
| 8690 | McMinnville USA | 4.4 | 3.8 | 5.5 | 7.4 | 5.3 | -- | -- | -- | -- |
| 8691 | Orient USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8692 | Rainier USA | 4.4 | 3.9 | 7 | -- | -- | -- | -- | -- | -- |
| 8693 | Silverton USA | 4.4 | 4.5 | 6.2 | 6.4 | 5.1 | -- | -- | -- | -- |
| 8694 | Newport USA | 4.4 | 4.2 | 4.5 | -- | -- | -- | -- | -- | -- |
| 8695 | Bryan USA | 4.4 | 4.9 | 8.1 | 6.7 | 12 | -- | -- | -- | -- |
| 8696 | Goldthwaite USA | 4.4 | 5.3 | -- | -- | -- | -- | -- | -- | -- |
| 8697 | Huntsville USA | 4.4 | 5.2 | 4.2 | 4.3 | 8.7 | 6.3 | 4.6 | -- | -- |
| 8698 | Morgan USA | 4.4 | 5.1 | 4.7 | 5.2 | 9.1 | 7 | 4.9 | -- | -- |
| 8699 | Park City USA | 4.4 | 4.8 | 3.6 | 2.8 | 7.6 | 5.9 | 3.5 | -- | -- |
| 8700 | Tooele USA | 4.4 | 4.8 | 5.6 | 5.5 | 19.9 | 11.5 | 4.6 | -- | -- |
| 8701 | Brier USA | 4.4 | 3.8 | 5.7 | 9.1 | 6.5 | 8.8 | 7.8 | -- | -- |
| 8702 | Duvall USA | 4.4 | 3.7 | 5.4 | 10.7 | 6.3 | 8.7 | 7 | -- | -- |
| 8703 | Hunts Point USA | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8704 | Maple Valley USA | 4.4 | 3.9 | 5 | 8.1 | 5.5 | -- | -- | -- | -- |
| 8705 | Medina USA | 4.4 | 4.3 | 5.6 | -- | -- | -- | -- | -- | -- |
| 8706 | Pomeroy USA | 4.4 | 4.3 | 4.6 | -- | -- | -- | -- | -- | -- |
| 8707 | Westport USA | 4.4 | 4.2 | 8.5 | 5.1 | 6.5 | -- | -- | -- | -- |
| 8708 | Shell Lake USA | 4.4 | 2.6 | 8 | 3.8 | 9.9 | -- | -- | -- | -- |
| 8709 |  Coffs Harbour Australia | 4.3 | 4.1 | 4.3 | 2.9 | 8.1 | 5.7 | -- | -- | -- |
| 8710 | Cowra Australia | 4.3 | 4.4 | 4.2 | 2.9 | 4.3 | -- | -- | -- | -- |
| 8711 | Boyne Island Australia | 4.3 | 3.7 | 6.2 | 5.1 | 4.7 | 4.9 | -- | -- | -- |
| 8712 | Nambour Australia | 4.3 | 5.2 | 5.7 | -- | -- | -- | -- | -- | -- |
| 8713 | Oatlands Australia | 4.3 | 4.2 | 3.5 | 4.1 | 3.9 | 5.5 | 5.9 | 6.8 | 5.7 |
| 8714 | Sheffield Australia | 4.3 | 4.5 | 3.4 | 3.8 | 3.8 | 5.5 | 5.1 | 4.7 | 3.6 |
