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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3880 |  Kingsbury USA | 4.3 | 4.2 | 4.2 | 6 | 22 | -- | -- | -- | -- |
| 3881 | Angel Fire USA | 4.3 | 4.5 | 3.6 | 2.6 | -- | -- | -- | -- | -- |
| 3882 | Los Alamos USA | 4.3 | 4 | 3.4 | 3.1 | 6.6 | 6.7 | 4.5 | -- | -- |
| 3883 | Nageezi USA | 4.3 | 4.7 | 4.3 | -- | -- | -- | -- | -- | -- |
| 3884 | Roswell USA | 4.3 | 4.5 | 4.5 | 4.4 | 8.9 | 6.6 | 7.2 | -- | -- |
| 3885 | Maupin USA | 4.3 | 3.9 | 7 | 6.7 | -- | -- | -- | -- | -- |
| 3886 | Wheeler USA | 4.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3887 | Dickinson USA | 4.3 | 5.3 | 7.8 | 6.3 | 9.8 | -- | -- | -- | -- |
| 3888 | Spring City USA | 4.3 | 3.7 | 2.4 | 5.2 | 10.2 | 8 | 4.3 | -- | -- |
| 3889 | Wolf Creek USA | 4.3 | 5.1 | 3 | 2.2 | 11.1 | -- | -- | -- | -- |
| 3890 | Bothell USA | 4.3 | 4 | 6 | 9.9 | 6.7 | 9.3 | 7.9 | -- | -- |
| 3891 | Boulevard Park USA | 4.3 | 4.2 | 6.7 | -- | -- | -- | -- | -- | -- |
| 3892 | Dayton USA | 4.3 | 3.7 | 6.1 | 5.3 | 5.9 | -- | 5.3 | 5.7 | 7.6 |
| 3893 | Fircrest USA | 4.3 | 4.8 | 7.6 | -- | -- | -- | -- | -- | -- |
| 3894 | North Bend USA | 4.3 | 3.3 | 4.5 | 8.6 | 5.8 | 8.7 | 4.8 | 4.7 | 5 |
| 3895 | Palouse USA | 4.3 | 4.1 | 6.6 | 7.9 | 20.2 | -- | -- | -- | -- |
| 3896 | Underwood USA | 4.3 | 4.2 | -- | -- | -- | -- | -- | -- | -- |
| 3897 |  Nanaimo Canada | 4.2 | 4.1 | 5.8 | 5.8 | 5.6 | 6.7 | 6 | -- | -- |
| 3898 | Sooke Canada | 4.2 | 4.2 | 5.8 | 7.6 | 7.9 | 10.6 | 8.8 | -- | -- |
| 3899 | Terrace Canada | 4.2 | 3.8 | 4.9 | 4.1 | 4.1 | 4.6 | 5.8 | -- | -- |
| 3900 | Victoria Canada | 4.2 | 4.1 | 5.6 | 6.6 | 5.6 | 6.2 | 7.1 | 9.1 | 7.4 |
| 3901 | West Vancouver Canada | 4.2 | 3.7 | 5.3 | 6.7 | 4.6 | 6.4 | 4.4 | -- | -- |
| 3902 | Fredericton Canada | 4.2 | 3.9 | 5.9 | 5.2 | 5.9 | 5.8 | -- | -- | -- |
| 3903 | Labrador City Canada | 4.2 | 4.5 | 6.8 | 3.5 | 3.3 | -- | 3.1 | -- | -- |
| 3904 | Port Hawkesbury Canada | 4.2 | 4.3 | 5.3 | 5.2 | 5.4 | 5 | 5.3 | 5.5 | 5.7 |
| 3905 |  Egmont Grenada | 4.2 | 4.5 | 4.5 | -- | -- | -- | -- | -- | -- |
| 3906 |  Chepo Panama | 4.2 | 5.9 | 6.6 | 7.9 | 6.9 | -- | -- | -- | -- |
| 3907 | Littlefield USA | 4.2 | 4.3 | 2.5 | -- | -- | -- | -- | -- | -- |
| 3909 | Dollar Point USA | 4.2 | 6 | -- | -- | -- | -- | -- | -- | -- |
| 3910 | Dutch Flat USA | 4.2 | 5.7 | 7.4 | 11.4 | -- | -- | -- | -- | -- |
| 3912 | Highlands USA | 4.2 | 3.8 | -- | -- | -- | -- | -- | -- | -- |
| 3913 | Kings Beach USA | 4.2 | 3.9 | 4.3 | 6.3 | 26.1 | -- | -- | -- | -- |
| 3914 | Lompico USA | 4.2 | 3.6 | -- | -- | -- | -- | -- | -- | -- |
| 3915 | Los Altos Hills USA | 4.2 | 3.9 | 5.2 | 6.4 | 7.3 | -- | -- | -- | -- |
| 3916 | Prunedale USA | 4.2 | 3.7 | 5.7 | 7.5 | 7.5 | -- | 8.9 | -- | -- |
| 3917 | San Rafael USA | 4.2 | 4.2 | 5 | 6.5 | 7.3 | 9.1 | 5.7 | 11.2 | 10 |
| 3918 | Solvang USA | 4.2 | 4.2 | 5.3 | 5.6 | 7.2 | -- | -- | -- | -- |
| 3919 | Sunol USA | 4.2 | 4.8 | 6.8 | 7.6 | -- | -- | -- | -- | -- |
| 3920 | Crook USA | 4.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3921 | San Luis USA | 4.2 | 3.8 | 3.8 | 3.6 | 12.2 | -- | -- | -- | -- |
| 3922 | Silverthorne USA | 4.2 | 3.7 | 2.5 | 1.7 | 7.9 | -- | -- | -- | -- |
| 3923 | Steamboat Springs USA | 4.2 | 3.7 | 2.8 | 2.1 | -- | -- | -- | -- | -- |
| 3924 | Orlando USA | 4.2 | 4.5 | 6.8 | 6.5 | 6.8 | 6.6 | 7 | -- | -- |
| 3925 | Saint Johns USA | 4.2 | 4.6 | 8.4 | 7.6 | -- | -- | -- | -- | -- |
| 3926 | Honolulu County USA | 4.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3927 | Kahaluu-Keauhou USA | 4.2 | 1.5 | 3.6 | 3.4 | 5.6 | -- | -- | -- | -- |
| 3928 | Winslow USA | 4.2 | 4.2 | 6.5 | 5.1 | -- | -- | -- | -- | -- |
| 3929 | Centreville USA | 4.2 | 4.8 | 9.8 | -- | -- | -- | -- | -- | -- |
| 3930 | Wilsall USA | 4.2 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 3931 | Summerlin South USA | 4.2 | 3.3 | 2.6 | -- | -- | -- | -- | -- | -- |
