2017-2025
World's most polluted cities | IQAir
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7039 |  Agawam Town USA | 6.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7040 | Boston city USA | 6.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7041 | Buckland USA | 6.2 | 4.6 | 5.8 | -- | -- | -- | -- | -- | -- |
| 7042 | Charlton USA | 6.2 | 5.9 | -- | -- | -- | -- | -- | -- | -- |
| 7043 | Danvers USA | 6.2 | 6.4 | -- | -- | -- | -- | -- | -- | -- |
| 7044 | Great Barrington USA | 6.2 | 5.3 | 7.7 | 6.8 | 9.1 | -- | -- | -- | -- |
| 7045 | Wellesley USA | 6.2 | 6.1 | 8.9 | -- | -- | -- | -- | -- | -- |
| 7046 | Okemos USA | 6.2 | 5.2 | 11.7 | 9.6 | 12 | -- | -- | -- | -- |
| 7047 | Oxford USA | 6.2 | 6.6 | 11.6 | 10.2 | 14 | -- | -- | -- | -- |
| 7048 | Browning USA | 6.2 | 5.9 | 5.8 | 6.5 | 18.5 | -- | -- | -- | -- |
| 7049 | Polson USA | 6.2 | 6.5 | 9.5 | 9.6 | 8.2 | -- | -- | -- | -- |
| 7050 | Victor USA | 6.2 | 9.2 | 6.7 | 9.3 | -- | -- | -- | -- | -- |
| 7051 | Grant USA | 6.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7052 | Valentine USA | 6.2 | 6.2 | 9.8 | 6.3 | 9.1 | -- | -- | -- | -- |
| 7053 | Sunrise Manor USA | 6.2 | 7.6 | 6.8 | 27.5 | 9.4 | -- | -- | -- | -- |
| 7054 | Cape May USA | 6.2 | 6.2 | 9.1 | -- | -- | -- | -- | -- | -- |
| 7055 | Lake Katrine USA | 6.2 | 5.8 | 11.9 | -- | -- | -- | -- | -- | -- |
| 7056 | Victor USA | 6.2 | 5.8 | 8.8 | -- | -- | -- | -- | -- | -- |
| 7057 | Greenville USA | 6.2 | 6.1 | 10 | 8.8 | 10.1 | 6.3 | 9.4 | 7 | 7.8 |
| 7058 | Grimesland USA | 6.2 | 6.8 | 11.4 | 8.9 | -- | -- | -- | -- | -- |
| 7059 | Lillington USA | 6.2 | 6.6 | 10.9 | 8.6 | -- | -- | -- | -- | -- |
| 7060 | Montrose-Ghent USA | 6.2 | 6.3 | 11.3 | 10.3 | 15.5 | -- | -- | -- | -- |
| 7061 | Aloha USA | 6.2 | 5.5 | 6.5 | 11 | 9.9 | 16 | 13.9 | -- | -- |
| 7062 | Baker City USA | 6.2 | 7.5 | 6.2 | 6.9 | 6.9 | 7.7 | 6.5 | 8.3 | 8.9 |
| 7063 | Burns USA | 6.2 | 15.3 | 8.2 | 8.9 | 11.8 | 11.6 | 7.7 | 10.1 | 10.8 |
| 7064 | Crescent Lake USA | 6.2 | 11.1 | -- | -- | -- | -- | -- | -- | -- |
| 7065 | Roseburg North USA | 6.2 | 5.9 | 15.1 | -- | -- | -- | -- | -- | -- |
| 7066 | Summerville USA | 6.2 | 6.6 | 6.4 | 8.8 | -- | -- | -- | -- | -- |
| 7067 | Talent USA | 6.2 | 6.3 | 10.8 | 7.5 | 11.2 | -- | 6.7 | -- | -- |
| 7068 | West Slope USA | 6.2 | 7.8 | -- | -- | -- | -- | -- | -- | -- |
| 7069 | State College USA | 6.2 | 6 | 9.2 | 8.2 | 9.6 | 7.3 | 9.9 | 8.7 | 9.4 |
| 7070 | Surfside Beach USA | 6.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7071 | Cookeville USA | 6.2 | 6.1 | 7.7 | 6.4 | 7.5 | 6.1 | 6.6 | 7.2 | -- |
| 7072 | Sevierville USA | 6.2 | 6.2 | 9 | 7.8 | 12.5 | -- | -- | -- | -- |
| 7073 | Duchesne USA | 6.2 | 6.1 | 4.5 | 2.8 | 8.9 | 8.7 | 4.6 | -- | -- |
| 7074 | Murray USA | 6.2 | 7.5 | 7.6 | 8.4 | 10.8 | 9.3 | 7.8 | -- | -- |
| 7075 | Smithfield USA | 6.2 | 7.1 | 8.5 | 7.8 | -- | -- | -- | -- | -- |
| 7076 | South Jordan USA | 6.2 | 6.8 | 7.3 | 6.7 | 10.4 | 9.1 | 6.9 | -- | -- |
| 7077 | Stowe USA | 6.2 | 5.1 | 6.6 | -- | -- | -- | -- | -- | -- |
| 7078 | Alexandria USA | 6.2 | 6.2 | 10.4 | 9.3 | 9.3 | 6.9 | 7.5 | 6.6 | 6.8 |
| 7079 | Blacksburg USA | 6.2 | 6.6 | 10.7 | 8.8 | 10.5 | -- | -- | -- | -- |
| 7080 | Roanoke USA | 6.2 | 5.7 | 10.1 | 9.7 | 11.8 | -- | -- | -- | -- |
| 7081 | Vinton USA | 6.2 | 6.1 | 8.4 | 7.5 | 8.3 | 7.1 | 7.6 | 7.1 | 6.7 |
| 7082 | Harpers Ferry USA | 6.2 | 6.5 | 10.7 | 10.4 | 13.1 | 10.9 | 12.5 | -- | -- |
| 7083 |  Geeveston Australia | 6.1 | 4.6 | 4.7 | 6.9 | 6.4 | 7.7 | 11.8 | 7.9 | 8.3 |
| 7084 | Wangaratta Australia | 6.1 | 6.9 | 6.5 | 4.8 | 5.3 | 13 | 7.9 | 7.3 | 9.5 |
| 7085 |  Bertrix Belgium | 6.1 | 3.7 | 4.4 | 5.6 | 6.1 | 6.6 | 7.9 | 9.1 | 8 |
| 7086 | Habay Belgium | 6.1 | 4.1 | 4.3 | 5.5 | 5 | 5.2 | 8.2 | 8.4 | 7.8 |
| 7087 |  Querencia Brazil | 6.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7088 |  Exshaw Canada | 6.1 | 5.8 | 10 | -- | -- | -- | -- | -- | -- |
