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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2868 |  Lewiston USA | 5.7 | 4.7 | 5.3 | 15.5 | 13.8 | 5.6 | 5.7 | 5.3 | 8.4 |
| 2869 | Leonardtown USA | 5.7 | 5.8 | 10 | 8.8 | 11.6 | -- | -- | -- | -- |
| 2870 | Millington USA | 5.7 | 4.7 | 6.4 | 6.3 | 5.6 | 4.8 | 6.1 | 6.8 | 8.7 |
| 2871 | Ashfield USA | 5.7 | 2.2 | -- | -- | -- | -- | -- | -- | -- |
| 2872 | Hanson USA | 5.7 | 5.7 | 8.3 | -- | -- | -- | -- | -- | -- |
| 2873 | Maynard USA | 5.7 | 6.3 | 7.8 | -- | -- | -- | -- | -- | -- |
| 2874 | Medford USA | 5.7 | 5.9 | 5.4 | 1.3 | 8.8 | -- | -- | -- | -- |
| 2875 | Milton USA | 5.7 | 5.2 | 8.3 | 6.5 | -- | -- | -- | -- | -- |
| 2876 | Newton USA | 5.7 | 5.2 | 7.8 | 6.7 | 9 | -- | -- | -- | -- |
| 2877 | Greenville USA | 5.7 | 7.3 | 9.3 | -- | -- | -- | -- | -- | -- |
| 2878 | Crosby USA | 5.7 | 4.1 | 9.2 | 4.6 | 6.8 | -- | -- | -- | -- |
| 2879 | Grand Marais USA | 5.7 | 3.5 | 7.4 | 4.3 | 9.1 | -- | -- | -- | -- |
| 2880 | Moberly USA | 5.7 | 4.9 | 8.2 | 5 | -- | -- | -- | -- | -- |
| 2881 | Greenough USA | 5.7 | 13.5 | -- | -- | -- | -- | -- | -- | -- |
| 2882 | Ogallala USA | 5.7 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 2883 | Hawthorne USA | 5.7 | 5.5 | 5.6 | 4.5 | 16.3 | -- | -- | -- | -- |
| 2884 | Alstead USA | 5.7 | 4.9 | 1.6 | 5.5 | 6.9 | -- | -- | -- | -- |
| 2885 | Brentwood USA | 5.7 | 5.3 | 7.6 | 6.6 | 7.8 | -- | -- | -- | -- |
| 2886 | Oceanville USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2887 | Cooperstown USA | 5.7 | 5 | 8 | -- | -- | -- | -- | -- | -- |
| 2888 | Liverpool USA | 5.7 | 4.2 | 8.3 | -- | -- | -- | -- | -- | -- |
| 2889 | New Baltimore USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2890 | Noyack USA | 5.7 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 2891 | Roanoke Rapids USA | 5.7 | 5.9 | 1.4 | 0.6 | 2.9 | -- | 7.1 | -- | -- |
| 2892 | Wadsworth USA | 5.7 | 6.1 | 10.6 | 9.7 | 12.6 | 11.2 | 13 | -- | -- |
| 2893 | Enterprise USA | 5.7 | 8.6 | 9.1 | 15 | 7.7 | 8.7 | 6.5 | 8.4 | 8.6 |
| 2894 | Estacada USA | 5.7 | 4.7 | 6.2 | 5.9 | 5.5 | -- | -- | -- | -- |
| 2895 | Green USA | 5.7 | 5.1 | 9.6 | -- | -- | -- | -- | -- | -- |
| 2896 | Hood River USA | 5.7 | 5.5 | 7.5 | 8.7 | 7.7 | 14.6 | 9.8 | -- | -- |
| 2897 | John Day USA | 5.7 | 12.1 | 9.9 | 7.6 | 8.8 | 10.8 | 8.9 | 10.6 | 11.1 |
| 2898 | Prineville USA | 5.7 | 7.3 | 8.3 | 6.9 | 10.1 | 11.2 | 7.6 | 9.7 | 11.5 |
| 2899 | Ronco USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2900 | Eagle Butte USA | 5.7 | 2.9 | -- | -- | -- | -- | -- | -- | -- |
| 2901 | Loretto USA | 5.7 | 6.1 | 9.7 | 8.9 | 11.4 | 7.3 | -- | -- | -- |
| 2902 | Brewster USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2903 | Rockport USA | 5.7 | 7 | 8.6 | 7.5 | 7.9 | 8.8 | -- | -- | -- |
| 2904 | Cedar Hills USA | 5.7 | 5.9 | 5.2 | 5.3 | 8.8 | 7.9 | 5.5 | -- | -- |
| 2905 | Hooper USA | 5.7 | 7.2 | 7.3 | 8.4 | 12.1 | 10.3 | -- | -- | -- |
| 2906 | Millcreek USA | 5.7 | 6.9 | 7.7 | 8.4 | 7 | -- | -- | -- | -- |
| 2907 | Myton USA | 5.7 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 2908 | Orem USA | 5.7 | 6 | 5.5 | 6.1 | 8.7 | 7.4 | 4.9 | -- | -- |
| 2909 | Toquerville USA | 5.7 | 4.8 | -- | -- | -- | -- | -- | -- | -- |
| 2910 | Windsor USA | 5.7 | 5.3 | 8.2 | -- | -- | -- | -- | -- | -- |
| 2911 | Giles USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2912 | Covington USA | 5.7 | 5.2 | 7.1 | 2.3 | -- | -- | -- | -- | -- |
| 2913 | Metaline USA | 5.7 | 4.5 | 6 | 8.1 | 14.7 | -- | -- | -- | -- |
| 2914 | Orchards USA | 5.7 | 4.8 | 9.3 | 15 | 6.8 | -- | -- | -- | -- |
| 2915 | Woodland USA | 5.7 | 5.2 | 6.2 | 10 | 7.2 | -- | -- | -- | -- |
| 2916 |  Ganges Canada | 5.6 | 5.4 | 7.8 | -- | -- | -- | -- | -- | -- |
| 2917 | Trail Canada | 5.6 | 5.4 | 9.8 | 10.1 | 21.3 | -- | -- | -- | -- |
