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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3729 |  Running Springs USA | 4.5 | 5.7 | 5.4 | 4.5 | -- | -- | -- | -- | -- |
| 3730 | San Carlos USA | 4.5 | 4.1 | 5.3 | 7.2 | 7.5 | 9.9 | 6.2 | -- | -- |
| 3731 | Strawberry USA | 4.5 | 4.4 | 5.4 | 7.1 | 8.3 | -- | -- | -- | -- |
| 3732 | Tahoe Vista USA | 4.5 | 4.7 | 5.8 | 1.9 | 25.6 | -- | -- | -- | -- |
| 3733 | Truckee USA | 4.5 | 4.5 | 4.4 | 7.5 | 14.2 | 11.1 | 7.2 | 11.8 | 14 |
| 3735 | Windsor USA | 4.5 | 4.5 | 6.4 | 6.6 | 7.4 | 11.1 | 7.3 | -- | -- |
| 3736 | Archuleta USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3737 | Cattle Creek USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3738 | Columbine Valley USA | 4.5 | 5.4 | -- | -- | -- | -- | -- | -- | -- |
| 3739 | Genesee USA | 4.5 | 4.3 | 4 | 2.9 | 11.2 | -- | -- | -- | -- |
| 3740 | La Plata USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3741 | Western Connecticut USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3742 | Glenvar Heights USA | 4.5 | 4.2 | -- | -- | -- | -- | -- | -- | -- |
| 3743 | Hialeah Gardens USA | 4.5 | 4.8 | -- | -- | -- | -- | -- | -- | -- |
| 3744 | Jupiter USA | 4.5 | 4.7 | 6.3 | 6.2 | 6.9 | -- | 4.8 | -- | -- |
| 3745 | Sawtooth City USA | 4.5 | 9.4 | 3.9 | 6.8 | -- | -- | -- | -- | -- |
| 3746 | Swan Valley USA | 4.5 | 7.7 | -- | -- | -- | -- | -- | -- | -- |
| 3747 | Tetonia USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3748 | Andover USA | 4.5 | 5.6 | 8.1 | -- | -- | -- | -- | -- | -- |
| 3749 | Barre USA | 4.5 | 5.5 | 8 | 7.6 | 8.8 | -- | -- | -- | -- |
| 3750 | Bellingham USA | 4.5 | 4.5 | 7.6 | 6.5 | 8.6 | 7.7 | 8.1 | -- | -- |
| 3751 | Northborough USA | 4.5 | 3.9 | 6.5 | 4.3 | -- | -- | -- | -- | -- |
| 3752 | Peabody city USA | 4.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3753 | Big Sky USA | 4.5 | 6.4 | 4.7 | 4.5 | 14.4 | -- | -- | -- | -- |
| 3754 | Livingston USA | 4.5 | 6.6 | 6.1 | 4.7 | 12 | -- | -- | -- | -- |
| 3755 | Santa Fe USA | 4.5 | 4.5 | 2.9 | 2.8 | 5 | 4.7 | 3.4 | 3.7 | -- |
| 3756 | Ardmore USA | 4.5 | 5.6 | 8.7 | 8 | 10.4 | -- | -- | -- | -- |
| 3757 | Bunker Hill USA | 4.5 | 4.2 | 6.6 | 14.3 | -- | -- | -- | -- | -- |
| 3758 | Camas USA | 4.5 | 4.3 | 6.1 | 9 | 6.1 | -- | -- | -- | -- |
| 3759 | Marysville USA | 4.5 | 4.4 | 6.5 | 10.9 | 7.1 | 9.2 | 8.9 | 8.2 | 8.3 |
| 3760 | Mercer Island USA | 4.5 | 3.7 | 5.6 | 9.8 | 6.3 | -- | -- | -- | -- |
| 3761 | Monroe USA | 4.5 | 3.8 | 5.5 | 10.7 | 6.3 | 10.4 | 9.1 | -- | -- |
| 3762 | Olympia USA | 4.5 | 4 | 5.6 | 9.2 | 6.2 | 8.9 | 6 | -- | -- |
| 3763 | Seattle USA | 4.5 | 4.1 | 6 | 9.3 | 6 | 8 | 7.5 | 8.3 | 8.5 |
| 3764 | Stevenson USA | 4.5 | 3.8 | 6.5 | 9 | 8 | -- | -- | -- | -- |
| 3765 | Woods Creek USA | 4.5 | 4 | 5.9 | 10.7 | 7.2 | -- | -- | -- | -- |
| 3766 | Wilson USA | 4.5 | 4.9 | 1.9 | 0.8 | 7.7 | -- | -- | -- | -- |
| 3767 |  Chemainus Canada | 4.4 | 4.6 | 6.8 | 9.3 | 8.2 | 9.5 | 9.1 | -- | -- |
| 3768 | Crofton Canada | 4.4 | 4.2 | 4.6 | 5.3 | 4.8 | 7.7 | -- | -- | -- |
| 3769 | Cumberland Canada | 4.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3770 | Gibsons Canada | 4.4 | 3.8 | 5.5 | 6.4 | 5.3 | 7 | 6.2 | 9.5 | 9.6 |
| 3771 | Madeira Park Canada | 4.4 | 4.3 | 7.3 | 9 | 7.9 | 8.4 | 8.5 | -- | -- |
| 3772 | Oak Bay Canada | 4.4 | 3.9 | 5.4 | 7 | 6.3 | -- | -- | -- | -- |
| 3773 | Grand Falls-Windsor Canada | 4.4 | 4.7 | 5.2 | 4.4 | 4.4 | -- | 3.6 | -- | -- |
| 3774 | Shelburne Canada | 4.4 | 3.8 | 6 | -- | -- | -- | -- | -- | -- |
| 3775 | Sydney Canada | 4.4 | 5.1 | 4.9 | 4.3 | 4.8 | 4.8 | 4.9 | 4.6 | 6.5 |
| 3776 | Saint Peters Canada | 4.4 | 4 | 4.9 | -- | -- | -- | -- | -- | -- |
| 3777 | Pemonca Canada | 4.4 | 4.9 | 6 | -- | -- | -- | -- | -- | -- |
| 3778 | Fairbanks USA | 4.4 | 4.6 | 4.9 | 9.5 | 5.4 | 5 | 10.4 | 7.7 | 8.5 |
| 3779 | Farmers Loop USA | 4.4 | 4.8 | 5.6 | 9.3 | 5.3 | -- | -- | -- | -- |
