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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7855 |  Quinns Rocks Australia | 5.3 | 3.8 | 1.8 | 2.6 | 8.2 | -- | -- | -- | -- |
| 7856 |  Colombo Brazil | 5.3 | 8.1 | 9.5 | 15.2 | 13.5 | -- | -- | -- | -- |
| 7857 |  Squamish Canada | 5.3 | 3.5 | 5.6 | 6.7 | 5.4 | 5.8 | -- | -- | -- |
| 7859 |  Ngari China | 5.3 | 6 | 5.5 | 5.6 | 7.2 | 6.2 | 6.9 | 14.1 | 13 |
| 7860 |  Aguas Zarcas Costa Rica | 5.3 | 6.9 | -- | -- | -- | -- | -- | -- | -- |
| 7861 |  Lohja Finland | 5.3 | 4.8 | 5.5 | 4.7 | 6.8 | -- | 5.3 | 6.2 | 4.7 |
| 7862 |  Eggebek Germany | 5.3 | 6 | 6.2 | 8 | 8.6 | 8.2 | 10.8 | 12.3 | 9.2 |
| 7863 |  Cabra Ireland | 5.3 | 4.3 | 5.2 | 6.1 | 4.2 | -- | -- | -- | -- |
| 7864 |  Bergen Norway | 5.3 | 5 | 4.8 | 5.5 | 5.9 | 5 | 5.9 | 5.5 | 5.2 |
| 7865 |  Azangaro Peru | 5.3 | 6 | -- | -- | -- | -- | -- | -- | -- |
| 7866 | Puno Peru | 5.3 | 6.5 | 7 | 5 | -- | -- | -- | -- | -- |
| 7867 |  Lalin Spain | 5.3 | 4.8 | 5 | -- | -- | -- | -- | -- | -- |
| 7868 |  Rasunda Sweden | 5.3 | 5.3 | 4.7 | 4.4 | 5 | -- | -- | -- | -- |
| 7869 | Södertälje Sweden | 5.3 | 32.4 | 7.7 | 10 | 7.8 | 7.6 | -- | -- | -- |
| 7870 |  Chirk United Kingdom | 5.3 | 4.6 | 4.2 | 4.4 | 3.3 | -- | -- | -- | -- |
| 7871 |  Bylas USA | 5.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7872 | Tucson USA | 5.3 | 5.4 | 3.5 | 3.2 | 4.8 | 5.9 | 4.2 | 5.4 | 7.1 |
| 7873 | El Dorado Hills USA | 5.3 | 5 | 6.3 | 7.6 | 13.2 | 15.3 | 6.3 | -- | -- |
| 7874 | Foresta USA | 5.3 | 4.6 | 6 | 9.3 | -- | -- | -- | -- | -- |
| 7875 | Groveland USA | 5.3 | 7 | 7 | 5.7 | 7.7 | 20.7 | 6.1 | -- | -- |
| 7876 | Lagunitas-Forest Knolls USA | 5.3 | 5.3 | 8.5 | 9.9 | 7.5 | -- | 6.2 | -- | -- |
| 7877 | Lakehead USA | 5.3 | 5.7 | -- | -- | -- | -- | -- | -- | -- |
| 7878 | Paradise USA | 5.3 | 5.2 | 5.3 | 4.9 | 14.9 | 11.7 | 4.3 | 17.9 | 6.8 |
| 7879 | Ridgecrest USA | 5.3 | 6 | 4.4 | 2.6 | 10.2 | -- | -- | -- | -- |
| 7880 | Salinas USA | 5.3 | 4.6 | 5.2 | 6.2 | 6.7 | 6.9 | 4.5 | 6.5 | 6.1 |
| 7881 | Saranap USA | 5.3 | 5.3 | -- | -- | -- | -- | -- | -- | -- |
| 7883 | Sutter Creek USA | 5.3 | 4.7 | 5 | 4.8 | 10.8 | 14.1 | 6.3 | -- | -- |
| 7884 | Tahoma USA | 5.3 | 4.5 | 5 | 5.8 | 22.5 | -- | -- | -- | -- |
| 7885 | Union City USA | 5.3 | 5.1 | 7 | 9.6 | 9.3 | 12.3 | 8.2 | -- | -- |
| 7886 | Watsonville USA | 5.3 | 3.3 | 4.8 | 6.2 | 8.4 | -- | -- | -- | -- |
| 7887 | West Menlo Park USA | 5.3 | 5.2 | 5.3 | 6.3 | 7.7 | -- | -- | -- | -- |
| 7888 | Cortez USA | 5.3 | 4.1 | 2.5 | 0.9 | 6.4 | -- | -- | -- | -- |
| 7889 | Fraser USA | 5.3 | 4.5 | 3.7 | 4.6 | 11.5 | -- | -- | -- | -- |
| 7890 | Fruita USA | 5.3 | 5 | 3.1 | 3.1 | 7.8 | 8.2 | 4.1 | -- | -- |
| 7891 | La Junta USA | 5.3 | 5.7 | 5.4 | -- | -- | -- | -- | -- | -- |
| 7892 | Springfield USA | 5.3 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 7893 | Walden USA | 5.3 | 5.4 | 5.1 | 5.1 | 9.5 | -- | -- | -- | -- |
| 7894 | Wellington USA | 5.3 | 5 | 4.5 | 2.6 | 8.7 | -- | -- | -- | -- |
| 7895 | Naples USA | 5.3 | 5.2 | 7.2 | 6.1 | 7.3 | 8.1 | 7.7 | 8.2 | 8.6 |
| 7896 | Oldsmar USA | 5.3 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 7897 | St. Petersburg USA | 5.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7898 | Young Harris USA | 5.3 | 5.6 | 8.5 | 7.7 | 9.1 | -- | -- | -- | -- |
| 7899 | Captain Cook USA | 5.3 | 2.5 | 3.9 | 7.2 | 10.1 | -- | 1.9 | -- | -- |
| 7900 | Riggins USA | 5.3 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 7901 | Cumberland USA | 5.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7902 | Westminster USA | 5.3 | 5.6 | 11.6 | 0.3 | 12.8 | -- | -- | -- | -- |
| 7903 | Athol USA | 5.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7904 | Nantucket USA | 5.3 | 3.5 | 6.6 | 5.6 | 7 | -- | -- | -- | -- |
| 7905 | Natick USA | 5.3 | 5.1 | 7.7 | 5.8 | 9 | 7.5 | 8.5 | -- | -- |
| 7906 | Rowe USA | 5.3 | -- | -- | -- | -- | -- | -- | -- | -- |
