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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8715 |  Wynyard Australia | 4.3 | 4.1 | 3.3 | 3.9 | 4 | 5.2 | 5.3 | 5.5 | 6.6 |
| 8716 | Hamilton Australia | 4.3 | 4.4 | 4.2 | 4.2 | 5.6 | 7.3 | 6.7 | -- | -- |
| 8717 | Melbourne Australia | 4.3 | 4.8 | 4.4 | 4.8 | 5.6 | 8.3 | 6.5 | 5.8 | 5.4 |
| 8718 |  Selkirk Canada | 4.3 | 6.2 | 10.7 | 6.6 | -- | -- | -- | -- | -- |
| 8719 | Queens County Canada | 4.3 | 3.9 | 5.4 | 4.7 | 6.7 | -- | -- | -- | -- |
| 8720 | Buchans Canada | 4.3 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 8721 | Schefferville Canada | 4.3 | 4.8 | 3.2 | 2.2 | 2.2 | -- | -- | -- | -- |
| 8722 |  Punta Arenas Chile | 4.3 | 4.5 | 3.8 | 4 | 4.3 | 4.7 | 4.7 | 4.5 | 5.5 |
| 8723 |  Auckland New Zealand | 4.3 | 3.3 | 3.4 | -- | -- | -- | -- | -- | -- |
| 8724 | Wellington New Zealand | 4.3 | 4.3 | 3.1 | 2.3 | 4.2 | -- | -- | -- | -- |
| 8725 |  Trondheim Norway | 4.3 | 4.5 | 5.2 | 5.2 | 6.1 | 4.8 | 5.9 | 6.4 | 5.1 |
| 8726 |  Bellingham United Kingdom | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8727 |  College USA | 4.3 | 4.7 | 4.8 | 8.9 | 6.1 | -- | -- | -- | -- |
| 8728 | Apache USA | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8729 | Sahuarita USA | 4.3 | 4.1 | 3.2 | 2 | 3.6 | -- | -- | -- | -- |
| 8730 | Village of Oak Creek USA | 4.3 | 4.4 | 2.4 | 1.6 | -- | -- | -- | -- | -- |
| 8731 | Alhambra Valley USA | 4.3 | 4.2 | -- | -- | -- | -- | -- | -- | -- |
| 8732 | Carnelian Bay USA | 4.3 | 4.6 | 5.8 | 6.8 | -- | -- | -- | -- | -- |
| 8733 | Carpinteria USA | 4.3 | 4.6 | 5.6 | 6.8 | 9.5 | 11.3 | 8.6 | -- | -- |
| 8734 | Fairbanks Ranch USA | 4.3 | 4 | -- | -- | -- | -- | -- | -- | -- |
| 8735 | Glen Ellen USA | 4.3 | 3.8 | 4.9 | 5.4 | -- | -- | -- | -- | -- |
| 8736 | Guadalupe USA | 4.3 | 3.8 | 5.4 | 6.6 | 7.4 | -- | -- | -- | -- |
| 8737 | Live Oak USA | 4.3 | 4.5 | 7.6 | 7.2 | 8.9 | -- | -- | -- | -- |
| 8738 | Los Altos USA | 4.3 | 4.1 | 5.1 | 6.4 | 7.3 | 10 | 6.4 | -- | -- |
| 8739 | Marina USA | 4.3 | 3.7 | 5 | 6.2 | 7 | -- | -- | -- | -- |
| 8740 | Menlo Park USA | 4.3 | 4 | 5.2 | 6.8 | 7.6 | 10.9 | 7.1 | -- | -- |
| 8741 | Millbrae USA | 4.3 | 3.6 | 5.2 | 6.8 | 8 | 10.1 | 7.1 | -- | -- |
| 8742 | Mono USA | 4.3 | 3.6 | 5.2 | -- | -- | -- | -- | -- | -- |
| 8743 | Newark USA | 4.3 | 4.9 | 6.8 | 9.5 | 9.4 | 10.8 | 6.4 | -- | -- |
| 8744 | Novato USA | 4.3 | 4.2 | 5.3 | 6.5 | 7.5 | 11.1 | 6.3 | -- | -- |
| 8745 | Pismo Beach USA | 4.3 | 4 | 5.6 | 6.5 | 7.4 | -- | -- | -- | -- |
| 8746 | Rohnert Park USA | 4.3 | 4.3 | 6.6 | 8.3 | 8.7 | 11.9 | 8.5 | -- | -- |
| 8747 | San Leandro USA | 4.3 | 4.8 | 6.4 | 8.8 | 9 | 12.2 | 7.5 | -- | -- |
| 8748 | Santa Rosa USA | 4.3 | 4 | 5.4 | 6.4 | 7.4 | 10.4 | 6.8 | -- | -- |
| 8749 | Sierra USA | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8750 | Whitehawk USA | 4.3 | 5.1 | -- | -- | -- | -- | -- | -- | -- |
| 8751 | Bayfield USA | 4.3 | 3.8 | 2.2 | 3 | 5.6 | -- | -- | -- | -- |
| 8752 | Frisco USA | 4.3 | 3.7 | 2.7 | 1.9 | 7.1 | -- | -- | -- | -- |
| 8753 | Gypsum USA | 4.3 | 3.5 | 2.5 | 2.7 | 8 | -- | 3.7 | -- | -- |
| 8754 | Hayden USA | 4.3 | 4 | 3.9 | 4 | 9.9 | -- | -- | -- | -- |
| 8755 | Paonia USA | 4.3 | 3.7 | 3.7 | 3.4 | 7.8 | 5.5 | 4.5 | -- | -- |
| 8756 | Snowmass Village USA | 4.3 | 3.7 | 2.5 | 1.8 | 9.1 | -- | -- | -- | -- |
| 8757 | Summit USA | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8758 | Lehigh Acres USA | 4.3 | 4.3 | 6.7 | 8.1 | 8.9 | -- | -- | -- | -- |
| 8759 | West Palm Beach USA | 4.3 | 3.2 | 3.7 | 2.1 | -- | -- | -- | -- | -- |
| 8760 | Sun Valley USA | 4.3 | 7.3 | 3.9 | 7.9 | 17.8 | -- | -- | -- | -- |
| 8761 | Knox USA | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8762 | Freetown USA | 4.3 | 3.7 | 6.2 | 3.3 | 7 | -- | -- | -- | -- |
| 8763 | Longmeadow USA | 4.3 | 3.9 | 7.1 | -- | -- | -- | -- | -- | -- |
| 8764 | Oak Bluffs USA | 4.3 | 4.1 | 7 | 5.6 | -- | -- | -- | -- | -- |
