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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2011 |  Apple Valley USA | 6.8 | 7.5 | 6.8 | 5.9 | 7.6 | 9.9 | 7 | -- | -- |
| 2012 | Bass Lake USA | 6.8 | 7.8 | 7.9 | 6.8 | 17.6 | -- | -- | -- | -- |
| 2013 | Coachella USA | 6.8 | 7.6 | 8.2 | 7.7 | 10.2 | -- | -- | -- | -- |
| 2014 | Coffee Creek USA | 6.8 | 6.8 | 7 | 5.1 | -- | -- | -- | -- | -- |
| 2015 | Downieville USA | 6.8 | 7.1 | 12.1 | 11.9 | 13.8 | -- | -- | -- | -- |
| 2016 | Indian Wells USA | 6.8 | 8.1 | -- | -- | -- | -- | -- | -- | -- |
| 2017 | Lemon Grove USA | 6.8 | 7.4 | 9.4 | 10.4 | 13.8 | -- | -- | -- | -- |
| 2019 | Newport Beach USA | 6.8 | 6.6 | 8 | 8.9 | 11.3 | 13 | 10.2 | -- | -- |
| 2020 | Orland USA | 6.8 | 6.4 | 7.3 | 7.6 | 14.2 | 17.9 | 8.2 | -- | -- |
| 2021 | Rolling Hills Estates USA | 6.8 | 6.5 | 7.8 | 8.7 | 10.7 | 12.4 | -- | -- | -- |
| 2024 | Stockton USA | 6.8 | 7.6 | 9.5 | 12 | 13.3 | 16.1 | 9.6 | 17.7 | 12.5 |
| 2025 | Wilsonia USA | 6.8 | 9.1 | -- | -- | -- | -- | -- | -- | -- |
| 2026 | Thornton USA | 6.8 | 7.3 | 9 | 6.5 | 12.7 | -- | -- | -- | -- |
| 2027 | Greater Bridgeport USA | 6.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2028 | Newtown USA | 6.8 | 5.3 | 9 | -- | -- | -- | -- | -- | -- |
| 2029 | Ridgefield USA | 6.8 | 6.3 | 9.5 | -- | -- | -- | -- | -- | -- |
| 2030 | Delaware City USA | 6.8 | 6.1 | 9.7 | 6.8 | 7.9 | -- | -- | -- | -- |
| 2031 | Tybee Island USA | 6.8 | 6.2 | -- | -- | -- | -- | -- | -- | -- |
| 2032 | Westlake USA | 6.8 | 8 | 11 | 10.4 | 10.7 | 10.6 | 10.7 | 11.3 | 11.1 |
| 2033 | Easton USA | 6.8 | 7.1 | 9.4 | -- | -- | -- | -- | -- | -- |
| 2034 | Essex USA | 6.8 | 8.1 | 11.4 | -- | -- | -- | -- | -- | -- |
| 2035 | Monson USA | 6.8 | 6 | -- | -- | -- | -- | -- | -- | -- |
| 2036 | Granada USA | 6.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2037 | Silver Bay USA | 6.8 | 5 | 9.6 | -- | -- | -- | -- | -- | -- |
| 2038 | El Dorado Springs USA | 6.8 | 5.6 | 6.9 | 6.5 | -- | -- | -- | -- | -- |
| 2039 | Helena Valley West Central USA | 6.8 | 7.2 | -- | -- | -- | -- | -- | -- | -- |
| 2040 | York USA | 6.8 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 2041 | Unionville USA | 6.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2042 | Brookside USA | 6.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2043 | Princeton USA | 6.8 | 6.2 | 10.8 | 8.1 | 11.7 | 10 | 10.7 | -- | -- |
| 2044 | Raritan USA | 6.8 | 1.8 | 6.7 | 9.5 | 12.1 | -- | -- | -- | -- |
| 2045 | Albany USA | 6.8 | 6.8 | 10 | 7.1 | 9 | 8.7 | 8 | 8.1 | 7.2 |
| 2046 | Altamont USA | 6.8 | 5.9 | 9.6 | -- | -- | -- | -- | -- | -- |
| 2047 | Cortlandt USA | 6.8 | 6.1 | 9.9 | -- | -- | -- | -- | -- | -- |
| 2048 | Fayetteville USA | 6.8 | 6 | 7 | -- | -- | -- | -- | -- | -- |
| 2049 | Holtsville USA | 6.8 | 5.8 | 7.8 | 5.7 | 6.6 | 6.3 | 6.4 | 7 | 6.5 |
| 2050 | Plattsburgh USA | 6.8 | 6.5 | 7.4 | -- | -- | -- | -- | -- | -- |
| 2051 | Utica USA | 6.8 | 5.6 | 7.3 | 6.2 | 6.5 | 5.6 | 5.5 | 5.6 | 5.8 |
| 2052 | Watervliet USA | 6.8 | 6.9 | 9.5 | -- | -- | -- | -- | -- | -- |
| 2053 | Apex USA | 6.8 | 6.5 | 10.4 | 10 | 11.7 | 9.9 | 12.6 | -- | -- |
| 2054 | Candor USA | 6.8 | 8.3 | 9.8 | 7.6 | 7.9 | 7.1 | 7.6 | 6.7 | 6.5 |
| 2055 | Carrboro USA | 6.8 | 7.5 | 11.6 | 10.8 | 13 | -- | -- | -- | -- |
| 2056 | Chapel Hill USA | 6.8 | 6.4 | 9.8 | 8.8 | 10.4 | 8.9 | 12 | -- | -- |
| 2057 | Marietta USA | 6.8 | 6.9 | 11.9 | 11.7 | -- | -- | -- | -- | -- |
| 2058 | Marion County USA | 6.8 | 5.9 | 7.2 | 15.4 | -- | -- | -- | -- | -- |
| 2059 | Birchwood Lakes USA | 6.8 | 6.2 | 8.3 | -- | -- | -- | -- | -- | -- |
| 2060 | Farrell USA | 6.8 | 6.1 | 8.6 | 7.2 | 7.9 | 7.4 | 8 | 8.3 | 11.9 |
| 2061 | Media USA | 6.8 | 6.6 | 10.3 | -- | -- | -- | -- | -- | -- |
| 2062 | Sewanee USA | 6.8 | 5.4 | -- | -- | -- | -- | -- | -- | -- |
| 2063 | College Station USA | 6.8 | 7.6 | 8.6 | 8.3 | 8.6 | -- | -- | -- | -- |
