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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8917 |  West Footscray Australia | 4 | 4.4 | 5.6 | -- | -- | -- | -- | -- | -- |
| 8918 |  Boa Vista Brazil | 4 | 10.5 | 7.2 | 4.5 | 5.6 | -- | -- | -- | -- |
| 8919 |  Scotch Creek Canada | 4 | 4.3 | 13.9 | 8.1 | 20.1 | 9.4 | 8.5 | -- | -- |
| 8920 | Sechelt Canada | 4 | 3.4 | 4.8 | 5.6 | 5.1 | 7.3 | 6 | -- | -- |
| 8921 | Bridgewater Canada | 4 | 3.5 | 9.4 | -- | -- | -- | -- | -- | -- |
| 8922 | Robinson Corner Canada | 4 | 3.7 | 5.3 | -- | -- | -- | -- | -- | -- |
| 8923 |  Raahe Finland | 4 | 4.2 | 5 | 5.9 | 5.7 | 5.9 | -- | -- | -- |
| 8924 | Tampere Finland | 4 | 4.8 | 5.2 | 4.5 | 5 | 4.5 | 4.8 | 5.7 | 3.9 |
| 8925 |  Harstad Norway | 4 | 4.7 | 5.1 | 5.2 | 5.2 | 4.6 | 6.4 | -- | -- |
| 8926 |  Putina Peru | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8928 |  Sollentuna Sweden | 4 | 4.6 | 4.6 | 5.8 | 5.2 | 5.1 | 5.6 | -- | -- |
| 8930 |  Brisbane USA | 4 | 4 | 5.6 | 7.1 | 8 | 11.1 | 6.8 | -- | -- |
| 8931 | Contra Costa USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8932 | El Cerrito USA | 4 | 3.6 | 5.3 | 7.1 | 7.6 | 10 | 6.3 | -- | -- |
| 8933 | Elkhorn USA | 4 | 2.9 | 5.9 | 7 | 8.1 | -- | -- | -- | -- |
| 8935 | Orcutt USA | 4 | 4.4 | 5.4 | 5.9 | 7.4 | -- | -- | -- | -- |
| 8936 | Pacifica USA | 4 | 3.8 | 5.3 | 7.1 | 7.6 | 8.6 | 6 | -- | -- |
| 8937 | San Benito USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8938 | San Mateo USA | 4 | 4 | 5 | 6.7 | 7.2 | 9.9 | 6 | -- | -- |
| 8939 | Sebastopol USA | 4 | 3.6 | 5.2 | 6.2 | 7 | 8.4 | 5.5 | 8.6 | 8.4 |
| 8940 | Sheep Ranch USA | 4 | 4.2 | 5.3 | 5.3 | -- | -- | -- | -- | -- |
| 8941 | Spring Valley USA | 4 | 4.4 | 8.1 | 7 | 12.4 | 12.9 | 11.3 | -- | -- |
| 8942 | Tiburon USA | 4 | 3.7 | 5 | 6.9 | 7.6 | 9.8 | 6.4 | -- | -- |
| 8943 | Trinidad USA | 4 | 3.9 | 5 | 4.4 | 6.3 | 9.8 | 6.7 | -- | -- |
| 8944 | Woodside USA | 4 | 3.5 | 4.3 | 5.1 | 6.3 | -- | 7.1 | -- | -- |
| 8945 | Crested Butte USA | 4 | 3.6 | 4.3 | 5 | 7.6 | -- | -- | -- | -- |
| 8946 | Eldorado Springs USA | 4 | 5.5 | 2.9 | 3 | -- | -- | -- | -- | -- |
| 8947 | Oak Creek USA | 4 | 4 | 2.5 | 2.3 | -- | -- | -- | -- | -- |
| 8948 | Guilford USA | 4 | 3.1 | 7.1 | 5.5 | 7.5 | 8.3 | 8.7 | -- | -- |
| 8949 | Sandalfoot Cove USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8950 | Kahului USA | 4 | 4.2 | 4 | 4.4 | 4.5 | 4.5 | 4.3 | 3.7 | 4.8 |
| 8951 | Victor USA | 4 | 5.2 | 4.3 | 4.9 | 16.5 | -- | -- | -- | -- |
| 8952 | Bar Harbor USA | 4 | 3.4 | 4.7 | 6.9 | 6.9 | 3.2 | 4.1 | 4.1 | 4.4 |
| 8953 | Vinalhaven USA | 4 | 3.7 | 5.9 | -- | -- | -- | -- | -- | -- |
| 8954 | East Longmeadow USA | 4 | 3.4 | 6.9 | 5 | -- | -- | -- | -- | -- |
| 8955 | Templeton USA | 4 | 3.6 | 6.6 | 4.3 | -- | -- | -- | -- | -- |
| 8956 | Choteau USA | 4 | 4.9 | 4 | -- | -- | -- | -- | -- | -- |
| 8957 | Crystal Bay USA | 4 | 4.4 | 4.8 | 7 | -- | -- | -- | -- | -- |
| 8958 | Gerlach USA | 4 | 4.3 | 3.9 | 2.1 | -- | -- | -- | -- | -- |
| 8959 | Mescalero USA | 4 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 8960 | New Hampton USA | 4 | 3.9 | 8.3 | 6.9 | -- | -- | -- | -- | -- |
| 8961 | Barnardsville USA | 4 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 8962 | Troutdale USA | 4 | 2.5 | 5.4 | 8.9 | 7.4 | -- | -- | -- | -- |
| 8963 | Pleasant Grove USA | 4 | 4.6 | 6.5 | 7.2 | 7.4 | -- | -- | -- | -- |
| 8964 | Beaux Arts Village USA | 4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8965 | Bellevue USA | 4 | 3.5 | 5 | 8.7 | 5.1 | 7.4 | 5.6 | 5.5 | -- |
| 8966 | Concrete USA | 4 | 3.8 | 5.3 | 11 | -- | -- | -- | -- | -- |
| 8967 | Cottage Lake USA | 4 | 3.5 | 5 | 11 | 5.6 | -- | -- | -- | -- |
| 8968 | Mukilteo USA | 4 | 3.7 | 5.1 | 8.2 | 5.5 | -- | -- | -- | -- |
| 8969 | Rockport USA | 4 | 7.5 | -- | -- | -- | -- | -- | -- | -- |
