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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7704 |  Nord USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7705 | Phoenix Lake USA | 5.5 | 5.2 | 6.4 | 6 | 11 | -- | -- | -- | -- |
| 7706 | Pleasant Hill USA | 5.5 | 5.3 | 6.5 | 7.9 | 9.4 | -- | -- | -- | -- |
| 7707 | Twain Harte USA | 5.5 | 4.9 | 7 | 6.5 | 11.7 | 20.7 | 8.3 | -- | -- |
| 7708 | Twentynine Palms USA | 5.5 | 6 | 3.9 | 2.3 | 4.3 | 6.3 | 3.9 | -- | -- |
| 7709 | Vacaville USA | 5.5 | 5 | 6 | 7.3 | 9.3 | 11.2 | 5.3 | 8.7 | 8.6 |
| 7710 | West Bishop USA | 5.5 | 4.8 | 3.7 | 2.4 | 11.3 | -- | -- | -- | -- |
| 7711 | Boulder County USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7712 | Castle Rock USA | 5.5 | 5.4 | 5.5 | 3.9 | 8.7 | -- | -- | -- | -- |
| 7713 | Dakota Ridge USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7714 | Lyons USA | 5.5 | 5.5 | 5.4 | 3.6 | 9.8 | -- | -- | -- | -- |
| 7715 | New Castle USA | 5.5 | 4.9 | 3.7 | 3.2 | 7.3 | -- | -- | -- | -- |
| 7716 | Silt USA | 5.5 | 5.3 | 3.6 | 2.9 | 4.9 | -- | -- | -- | -- |
| 7717 | Branford USA | 5.5 | 5.2 | 8.8 | 7.7 | 8.2 | -- | -- | -- | -- |
| 7718 | Haines City USA | 5.5 | 4.9 | -- | -- | -- | -- | -- | -- | -- |
| 7719 | Stuart USA | 5.5 | 6.3 | 7.5 | 8.4 | 8.7 | 8.3 | 7.9 | 7.8 | 8 |
| 7720 | Kaiminani USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7721 | Boise USA | 5.5 | 10.3 | 6.4 | 8.5 | 10.7 | 9.3 | 6.9 | -- | -- |
| 7722 | Twin Falls USA | 5.5 | 7.5 | 5.1 | 6.4 | 8.6 | 7 | 5 | 8.4 | 9.5 |
| 7723 | Bangor USA | 5.5 | 5 | 5.3 | 5 | 4.8 | 4.7 | 4.9 | 5.3 | 5.5 |
| 7724 | Brunswick USA | 5.5 | 5.3 | 9.2 | -- | -- | -- | -- | -- | -- |
| 7725 | Fall River USA | 5.5 | 5.3 | 7.6 | 6.3 | 7.2 | 7.5 | 7.2 | 7.5 | 7.2 |
| 7726 | North Reading USA | 5.5 | 5.6 | 8.6 | 7.7 | 9 | -- | -- | -- | -- |
| 7727 | Pepperell USA | 5.5 | 5.3 | 7 | 6.3 | 9.4 | -- | -- | -- | -- |
| 7728 | Sharon USA | 5.5 | 5.6 | 7.9 | 6.6 | 8.6 | -- | -- | -- | -- |
| 7729 | Weymouth Town USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7730 | Cut Bank USA | 5.5 | 5.7 | 4.5 | 8.5 | 9.4 | -- | -- | -- | -- |
| 7731 | Miles City USA | 5.5 | 6.6 | 8.5 | -- | -- | -- | -- | -- | -- |
| 7732 | Fallon USA | 5.5 | 6.6 | 5 | 7.4 | 19.4 | -- | -- | -- | -- |
| 7733 | Monmouth USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7734 | Albuquerque USA | 5.5 | 5.6 | 4 | 4.2 | 6.5 | 6.9 | 6.1 | 5.6 | 5.7 |
| 7735 | Clifton USA | 5.5 | 4.7 | 7.3 | -- | -- | -- | -- | -- | -- |
| 7736 | Norwich USA | 5.5 | 5.5 | 7.9 | -- | -- | -- | -- | -- | -- |
| 7737 | Ravena USA | 5.5 | 5.2 | 7.4 | -- | -- | -- | -- | -- | -- |
| 7738 | Shokan USA | 5.5 | 4.9 | 8.4 | 6.4 | 8.8 | -- | -- | -- | -- |
| 7739 | Buncombe USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7740 | Ashland USA | 5.5 | 5.7 | 9.8 | 7.8 | 15.2 | 12.4 | 6.4 | 14.8 | 10.9 |
| 7741 | Independence USA | 5.5 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 7742 | Keizer USA | 5.5 | 4.9 | 7.8 | 10.2 | 8 | 15.2 | 9.9 | -- | -- |
| 7743 | La Grande USA | 5.5 | 6.3 | 6.1 | 8.7 | 6.1 | 7.8 | 5.6 | 8.5 | -- |
| 7744 | Sisters USA | 5.5 | 7.5 | 11.7 | 6.8 | 8.9 | 16 | 5.7 | 7.3 | 12 |
| 7745 | Springfield USA | 5.5 | 5.4 | 7.4 | 9.4 | 7.3 | 16 | 9 | 9 | 11.2 |
| 7746 | Charleston USA | 5.5 | 4.5 | 8.8 | 8.9 | 8.9 | 7.7 | 9.1 | 7.5 | 7.7 |
| 7747 | Morristown USA | 5.5 | 5.5 | 5.8 | 1.6 | 9.5 | -- | -- | -- | -- |
| 7748 | Tellico Village USA | 5.5 | 5.9 | 5.6 | -- | -- | -- | -- | -- | -- |
| 7749 | Kaysville USA | 5.5 | 6.9 | 7 | 7.4 | 10.9 | 8.8 | 6.2 | -- | -- |
| 7750 | Payson USA | 5.5 | 5.7 | 5.6 | 6.1 | 8.8 | 7.4 | 5.8 | -- | -- |
| 7751 | Waitsfield USA | 5.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7752 | Airway Heights USA | 5.5 | 5.1 | 6.9 | 6.9 | 9.3 | -- | -- | -- | -- |
| 7753 | Brewster USA | 5.5 | 5.4 | 8.4 | 5.6 | 14.5 | 11.9 | 7.7 | -- | -- |
