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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1855 |  Utsunomiya Japan | 9 | 8.4 | 9.4 | 9.1 | 10.3 | 11 | 12.3 | 12.6 | 12.2 |
| 1856 | Fussa Japan | 9 | 7.7 | 8.5 | 7.9 | 8.2 | 10 | 10.7 | 11.2 | 10.7 |
| 1857 | Nishitokyo Japan | 9 | 8.2 | 8.9 | 8.3 | 8.4 | 9.9 | 11.5 | 13.6 | 13.2 |
| 1858 | Takaoka Japan | 9 | 7.7 | 9.4 | 10.2 | 10.9 | 10 | 11.2 | 11.5 | 11.7 |
| 1859 | Chuo Japan | 9 | 7.9 | -- | -- | -- | -- | -- | -- | -- |
| 1860 |  Yilan Taiwan | 9 | 9 | -- | -- | -- | -- | -- | -- | -- |
| 1861 |  Ban Mai Thailand | 9 | 14.5 | 18 | -- | -- | -- | -- | -- | -- |
| 1862 |  City of Balikpapan Indonesia | 8.9 | 9.8 | 11.8 | 7.8 | -- | -- | -- | -- | -- |
| 1863 | Haruki Japan | 8.9 | 7.3 | -- | -- | -- | -- | -- | -- | -- |
| 1864 | Ichikawa Japan | 8.9 | 8.3 | 9.1 | 8.6 | 8.6 | 9.3 | 10 | 12.6 | 12 |
| 1865 | Kisarazu Japan | 8.9 | 7.8 | 8.7 | 8.4 | 8.9 | 9.4 | 11.1 | 11.8 | 11.4 |
| 1866 | Echizen Japan | 8.9 | 6.9 | 8.2 | 10.2 | 9.4 | -- | -- | -- | -- |
| 1867 | Ebina Japan | 8.9 | 8 | 9 | 8.4 | 8.3 | 6.7 | 6.7 | 7.5 | 7 |
| 1868 | Isehara Japan | 8.9 | 7.5 | 8.4 | 10.1 | 11.3 | -- | 12.2 | 13.3 | 12.4 |
| 1869 | Yokohama Japan | 8.9 | 8.4 | 8.7 | 8.6 | 8.6 | 9.6 | 10.5 | 11.3 | 10.7 |
| 1870 | Togitsu Japan | 8.9 | 9.1 | 9.7 | 9.2 | 9.9 | 10.6 | 11.1 | -- | -- |
| 1871 | Iruma Japan | 8.9 | 8.9 | 9.6 | 8.6 | 9.9 | 10.8 | 12.3 | 12.8 | 12 |
| 1872 | Ogawa Japan | 8.9 | 7.9 | 9.6 | 8.6 | 9.1 | 9.6 | 10.7 | 11.8 | -- |
| 1873 | Izumo Japan | 8.9 | 7.9 | 9.9 | 9 | 9.3 | 9.7 | 10.2 | -- | -- |
| 1874 | Aramachi Japan | 8.9 | 8 | -- | -- | -- | -- | -- | -- | -- |
| 1875 | Hachioji Japan | 8.9 | 7.6 | 8.3 | 8.1 | 7.8 | 8.9 | 10.4 | 11.6 | 11.8 |
| 1876 | Pangkalpinang Indonesia | 8.8 | 17.5 | 5.5 | 3.3 | 3.7 | -- | -- | -- | -- |
| 1877 | Nagakute Japan | 8.8 | 7.8 | 7.8 | 8 | 8.3 | 9 | 10.8 | 11.3 | 10.5 |
| 1878 | Seto Japan | 8.8 | 7.4 | 8.2 | 8.4 | 9.2 | 9.2 | 10.4 | 11.3 | 11.2 |
| 1879 | Toyokawa Japan | 8.8 | 7.4 | 8.4 | 7.9 | 8.3 | 8.5 | 10.2 | 12.9 | 12.8 |
| 1880 | Yazakohirako Japan | 8.8 | 7.8 | -- | -- | -- | -- | -- | -- | -- |
| 1881 | Narashino Japan | 8.8 | 8 | 9.4 | 8.1 | 7.6 | 8.6 | -- | -- | -- |
| 1882 | Munakata Japan | 8.8 | 8.1 | 9.9 | 11.8 | 11.4 | 11 | 12.6 | 12.3 | 12.9 |
| 1883 | Motosu Japan | 8.8 | 6.4 | 8.4 | 6.9 | 7.4 | 8 | 10 | -- | -- |
| 1884 | Mito Japan | 8.8 | 12.2 | 12.3 | 11.7 | 11.4 | -- | 12.8 | 13.2 | 11.1 |
| 1885 | Hiratsuka Japan | 8.8 | 8 | 8.7 | 8.3 | 8 | 8.7 | 10.5 | 11.7 | 13.1 |
| 1886 | Kamakura Japan | 8.8 | 7.7 | 8.6 | 8.4 | 8.4 | 8.4 | 10.2 | 11.3 | 9.8 |
| 1887 | Odawara Japan | 8.8 | 7.2 | 7.9 | 10.3 | 10.5 | 10.1 | 12.7 | 11.8 | 10.3 |
| 1888 | Haiki Japan | 8.8 | 8.7 | -- | -- | -- | -- | -- | -- | -- |
| 1889 | Yono Japan | 8.8 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 1890 | Minano Japan | 8.8 | 8.4 | 10.9 | 10 | 9.9 | 10.3 | 11.9 | 12.6 | -- |
| 1891 | Koka Japan | 8.8 | 7.8 | 9.4 | 8.7 | 8.4 | 9.3 | 10.6 | 10.6 | 11 |
| 1892 | Masuda Japan | 8.8 | 7.6 | 8.7 | 8.3 | 8.6 | 9.4 | 10.1 | 11.7 | 12.5 |
| 1893 | Oda Japan | 8.8 | 7.7 | 9.2 | 8.8 | 8.7 | 9.6 | 9.6 | -- | -- |
| 1894 | Atami Japan | 8.8 | 7.4 | 8.2 | 7.7 | 7.9 | -- | 9.2 | 10 | 9.4 |
| 1895 | Fujinomiya Japan | 8.8 | 8.1 | 10.3 | 8.7 | 8.4 | -- | 9.9 | 10.3 | 10.3 |
| 1896 | Kosai Japan | 8.8 | 6.6 | 7.6 | 7 | 8 | -- | 11.8 | 11.8 | 10.5 |
| 1897 | Numazu Japan | 8.8 | 7.6 | 8 | 7.8 | 8.1 | -- | 9 | 9.6 | -- |
| 1898 | Ban Ko Kaeo Thailand | 8.8 | 9.8 | 11 | -- | -- | -- | -- | -- | -- |
| 1899 | Ajikidai Japan | 8.7 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 1900 | Narita Japan | 8.7 | 7.6 | 8.5 | 8 | 7.8 | 8.8 | 11.3 | 12.1 | 11.7 |
| 1901 | Kasama Japan | 8.7 | 7.8 | 7.8 | 7.5 | 6.7 | 7.3 | 8 | 9 | 10.6 |
| 1902 | Chigasaki Japan | 8.7 | 8.5 | 11.9 | 11 | 11 | 10.4 | 12.8 | 13.8 | 13.6 |
| 1903 | Yamakita Japan | 8.7 | 7.7 | 8.4 | 7.7 | 7.7 | 7.9 | 8.6 | -- | -- |
| 1904 | Yokosuka Japan | 8.7 | 8 | 8.6 | 8.8 | 9.7 | 10.5 | 11.7 | 12.6 | 11.6 |
