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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1808 |  Mocksville USA | 7.1 | 6 | -- | -- | -- | -- | -- | -- | -- |
| 1809 | Chagrin Falls USA | 7.1 | 6 | 10.5 | -- | -- | -- | -- | -- | -- |
| 1810 | Lebanon USA | 7.1 | 6.1 | 8.9 | 8.8 | 10.1 | 7.6 | 9.1 | 8.5 | 9.1 |
| 1811 | Milford Center USA | 7.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1812 | Seiling USA | 7.1 | 8.1 | 7.8 | 7.8 | 7.8 | 7.3 | 8.1 | 8.1 | 6.9 |
| 1813 | Prairie City USA | 7.1 | 10.6 | 8.5 | 9 | 16.4 | -- | -- | -- | -- |
| 1814 | Biglerville USA | 7.1 | 8 | 11.2 | 8.4 | 9.1 | -- | 9.5 | 7.7 | 7.8 |
| 1815 | Bradford Woods USA | 7.1 | 5.8 | 8.4 | 2.9 | 11.1 | 9 | 10.6 | -- | -- |
| 1816 | Charleroi USA | 7.1 | 7.1 | 11.1 | 9.6 | 9.1 | 5.9 | 7.4 | 8.7 | 10.6 |
| 1817 | Coudersport USA | 7.1 | 5.9 | -- | -- | -- | -- | -- | -- | -- |
| 1818 | Ligonier USA | 7.1 | 6.5 | 10.1 | 9.5 | 11.2 | 9.4 | 10.5 | -- | -- |
| 1819 | Murrysville USA | 7.1 | 6.7 | 10.4 | 4.2 | 8.3 | 5.1 | 6 | 7.5 | -- |
| 1820 | Rockwood USA | 7.1 | 9 | -- | -- | -- | -- | -- | -- | -- |
| 1821 | West Mifflin USA | 7.1 | 6.7 | 11.5 | 11 | 14 | -- | 12.4 | -- | -- |
| 1822 | Wilcox USA | 7.1 | 7.8 | -- | -- | -- | -- | -- | -- | -- |
| 1823 | Clarksville USA | 7.1 | 6.5 | 9.5 | 12.4 | -- | -- | -- | -- | -- |
| 1824 | Dyersburg USA | 7.1 | 6.4 | 7.9 | 7.7 | 8.2 | 6.4 | 7 | 7.4 | 7.2 |
| 1825 | Hartsville/Trousdale County USA | 7.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1826 | Galveston USA | 7.1 | 6.9 | 9.7 | 8.4 | 8.1 | 8.8 | 8 | 8.8 | 9.8 |
| 1827 | Georgetown USA | 7.1 | 8.2 | 9.1 | 9.6 | 10.9 | -- | -- | -- | -- |
| 1828 | Jolly USA | 7.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1829 | Leakey USA | 7.1 | 8.5 | 6.9 | -- | -- | -- | -- | -- | -- |
| 1830 | Manila USA | 7.1 | 7.1 | 8.5 | -- | -- | -- | -- | -- | -- |
| 1831 | Amelia Court House USA | 7.1 | 6.4 | -- | -- | -- | -- | -- | -- | -- |
| 1832 | Lovettsville USA | 7.1 | 5.1 | 7.3 | 1.6 | 7.8 | -- | -- | -- | -- |
| 1833 | Richmond USA | 7.1 | 6.9 | 11 | 10.3 | 11.9 | 8.8 | 11.4 | 7.2 | 7.2 |
| 1834 | Coulee Dam USA | 7.1 | 6.8 | 10 | 8.7 | 13.4 | 8.9 | 6.7 | -- | -- |
| 1835 | Millwood USA | 7.1 | 7.3 | -- | -- | -- | -- | -- | -- | -- |
| 1836 | Pateros USA | 7.1 | 6.8 | 9.1 | 8.1 | 14.4 | 11.9 | 7.3 | -- | -- |
| 1837 | Selah USA | 7.1 | 5.4 | 8.3 | 8.4 | 15.1 | -- | -- | -- | -- |
| 1838 | Torrington USA | 7.1 | 7.3 | 7 | -- | -- | -- | -- | -- | -- |
| 1839 |  Alexandria Canada | 7 | 4.2 | 12 | -- | -- | -- | -- | -- | -- |
| 1840 | Penticton Canada | 7 | 5.6 | 10.5 | 7.7 | 7.9 | -- | -- | -- | -- |
| 1841 | Gatineau Canada | 7 | 6 | 9.6 | 7.1 | 9.9 | 8 | 7.8 | -- | -- |
| 1842 | Trussville USA | 7 | 7.6 | 11.4 | -- | -- | -- | -- | -- | -- |
| 1843 | Golden Hills USA | 7 | 6.7 | 7.1 | 5.8 | 10.3 | -- | -- | -- | -- |
| 1844 | Heber USA | 7 | 7 | 6.8 | 7.3 | 8.8 | -- | -- | -- | -- |
| 1845 | Holtville USA | 7 | 9.6 | 6.7 | 7.1 | 7.7 | -- | -- | -- | -- |
| 1846 | Iron Horse USA | 7 | 6.3 | -- | -- | -- | -- | -- | -- | -- |
| 1847 | Linden USA | 7 | 7.7 | 7.9 | -- | -- | -- | -- | -- | -- |
| 1848 | Placerville USA | 7 | 5.1 | 5.9 | 7 | 18.2 | 15.1 | 6.6 | -- | -- |
| 1849 | San Clemente USA | 7 | 6.1 | 9.2 | 8.7 | 12.2 | -- | -- | -- | -- |
| 1850 | Susanville USA | 7 | 8.1 | 7.2 | 6.6 | 22.6 | 26.2 | 6.4 | -- | -- |
| 1851 | Three Rivers USA | 7 | 8.4 | 9.4 | 9.3 | 27.4 | 23.1 | 9 | 20.8 | 20.4 |
| 1853 | Val Verde USA | 7 | 7.7 | 6.9 | -- | -- | -- | -- | -- | -- |
| 1854 | Victorville USA | 7 | 7.7 | 7.2 | 7.2 | 7.9 | 9.9 | 7.3 | -- | -- |
| 1855 | Lakewood USA | 7 | 6.7 | 6.2 | 4.2 | 11 | -- | -- | -- | -- |
| 1856 | Deep River Center USA | 7 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 1857 | Winsted USA | 7 | 5.3 | 8.8 | -- | -- | -- | -- | -- | -- |
| 1858 | Winter Garden USA | 7 | 6.1 | -- | -- | -- | -- | -- | -- | -- |
