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 (concentration in μg/m3 categorized by WHO guideline)
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1859 |  Brunswick USA | 7 | 7.3 | 8.6 | 10.2 | 5.4 | -- | -- | -- | -- |
| 1860 | Coolin USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1861 | Lawrence USA | 7 | 6.4 | 9.4 | 8.5 | 11.4 | -- | -- | -- | -- |
| 1862 | Ashland USA | 7 | 6.6 | 9.1 | 7.8 | 8.8 | 7.5 | 7.8 | 7.9 | 8.8 |
| 1863 | Slidell USA | 7 | 5.5 | 10.3 | 10.3 | 10.2 | 9.5 | 11.1 | -- | -- |
| 1864 | Bowie USA | 7 | 9 | 12.1 | 14.4 | -- | -- | -- | -- | -- |
| 1865 | Clarksburg USA | 7 | 7.6 | 10.3 | 10.4 | -- | -- | -- | -- | -- |
| 1866 | Hughesville USA | 7 | 6.4 | 8.1 | -- | -- | -- | -- | -- | -- |
| 1867 | Kensington USA | 7 | 6.6 | 12.5 | 11 | 12.6 | -- | -- | -- | -- |
| 1868 | Largo USA | 7 | 6.7 | 12 | 10.6 | 10.7 | -- | -- | -- | -- |
| 1869 | Springfield USA | 7 | 6.5 | 9.3 | 8.4 | 9.7 | 8.5 | 7.7 | -- | -- |
| 1870 | Edina USA | 7 | 6.5 | 11.9 | 8.9 | 12.6 | -- | -- | -- | -- |
| 1871 | Lake City USA | 7 | 6.8 | 7.9 | -- | -- | -- | -- | -- | -- |
| 1872 | Lake Elmo USA | 7 | 6.2 | 11.1 | -- | -- | -- | -- | -- | -- |
| 1873 | Onamia USA | 7 | 5.2 | 11.9 | 6.3 | 8.6 | -- | -- | -- | -- |
| 1874 | Tamarack USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1875 | Warroad USA | 7 | 5.3 | 9.6 | 5 | 12.9 | -- | -- | -- | -- |
| 1876 | Indianola USA | 7 | 7.1 | 11.6 | -- | -- | -- | -- | -- | -- |
| 1877 | Kearney USA | 7 | 5 | 7 | 5.7 | 6.6 | 6.2 | 6.6 | 6.5 | 7.3 |
| 1878 | St. Charles County USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1879 | Bellevue USA | 7 | 7.5 | 7.9 | 6.6 | 8.8 | 8.2 | 8.3 | 9 | 9.5 |
| 1880 | Lincoln USA | 7 | 6.6 | 9.8 | 6.3 | 8.7 | 7.3 | 8.8 | 7.5 | 11.4 |
| 1881 | Nashua USA | 7 | 8.6 | -- | -- | -- | -- | -- | -- | -- |
| 1882 | Cranbury USA | 7 | 6.9 | 8.1 | -- | -- | -- | -- | -- | -- |
| 1883 | Croton-on-Hudson USA | 7 | 6.1 | 9.3 | -- | -- | -- | -- | -- | -- |
| 1884 | Webster USA | 7 | 7.1 | 11.5 | 8.6 | 11.2 | -- | -- | -- | -- |
| 1885 | Rockingham USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1886 | Spruce Pine USA | 7 | 6.2 | 6.9 | 6.3 | 6.7 | 5.4 | 8.4 | 5.6 | 6.9 |
| 1887 | Batavia USA | 7 | 4.8 | 6.5 | 9.2 | 6.6 | 6.1 | 7.2 | 7.1 | 8.9 |
| 1888 | Lawton USA | 7 | 6.5 | 8.2 | 7.3 | 8.7 | 8.2 | 8.6 | 7.1 | 7.1 |
| 1889 | Oakridge USA | 7 | 9.8 | 10.8 | 33.5 | 15.9 | 13.3 | 9.7 | 10.5 | 17.5 |
| 1890 | Hereford USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1891 | Houston USA | 7 | 6.2 | 6.5 | 8.5 | -- | -- | -- | -- | -- |
| 1892 | Fort Thompson USA | 7 | 6.9 | 5.7 | -- | -- | -- | -- | -- | -- |
| 1893 | Bluff City USA | 7 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 1894 | Johnson City USA | 7 | 7.2 | 10.9 | -- | -- | -- | -- | -- | -- |
| 1895 | North Richland Hills USA | 7 | 7.2 | 10 | 10.1 | 12.3 | -- | -- | -- | -- |
| 1896 | Winnsboro USA | 7 | 7.2 | 7.9 | -- | -- | -- | -- | -- | -- |
| 1897 | St. Albans USA | 7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1898 | Chesterfield USA | 7 | 7 | 9.8 | 10.1 | 12.1 | -- | -- | -- | -- |
| 1899 | Harrisonburg USA | 7 | 7.4 | 11.2 | -- | -- | -- | -- | -- | -- |
| 1900 | College Place USA | 7 | 6.2 | 3.3 | -- | -- | -- | -- | -- | -- |
| 1901 | Harrington USA | 7 | 8.3 | 12.6 | -- | -- | -- | -- | -- | -- |
| 1902 | Moses Lake USA | 7 | 6.1 | 8.9 | 11.8 | 12.6 | -- | 5.7 | 8 | 9.6 |
| 1903 | Newport USA | 7 | 6.4 | 10.2 | 10.7 | 11.1 | -- | -- | -- | -- |
| 1904 | Valley USA | 7 | 5.9 | 10.4 | 8.7 | -- | -- | -- | -- | -- |
| 1905 | Superior USA | 7 | 4.2 | 7.5 | 5.4 | 9.8 | -- | -- | -- | -- |
| 1906 |  Carrot Creek Canada | 6.9 | 6.9 | 15.3 | 8.3 | 7.1 | -- | -- | -- | -- |
| 1907 | Stony Plain Canada | 6.9 | 7.6 | 14.5 | 7.8 | 11.5 | -- | -- | -- | -- |
| 1908 | Fort St John Canada | 6.9 | 9.8 | 18.7 | 6.3 | 5.8 | 4.7 | -- | -- | -- |
