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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3932 |  Verdi USA | 4.2 | 4.9 | 4.9 | 8 | 9.1 | -- | -- | -- | -- |
| 3933 | Clatsop USA | 4.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3934 | Detroit USA | 4.2 | 3 | 4.6 | 7.1 | 10.4 | -- | -- | -- | -- |
| 3935 | Florence USA | 4.2 | 3.5 | 4.2 | 5.3 | 3.8 | 6.4 | 5.6 | -- | -- |
| 3936 | Oregon City USA | 4.2 | 4 | 5.5 | 7.4 | 4.5 | -- | -- | -- | -- |
| 3937 | Rowena USA | 4.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3938 | Scappoose USA | 4.2 | 3.4 | 6.6 | 9.2 | 9.2 | -- | -- | -- | -- |
| 3939 | Eden USA | 4.2 | 5.5 | 4.8 | 4.9 | 8.2 | 5.8 | 3.7 | -- | -- |
| 3940 | Sundance USA | 4.2 | 4.3 | 3.9 | 3.6 | 9.1 | 7.2 | 3.8 | -- | -- |
| 3941 | Castle Rock USA | 4.2 | 4 | -- | -- | -- | -- | -- | -- | -- |
| 3942 | Eatonville USA | 4.2 | 3.4 | 5.4 | 10.1 | -- | -- | -- | -- | -- |
| 3943 | Edmonds USA | 4.2 | 4 | 5.8 | 9.1 | 6.3 | -- | -- | -- | -- |
| 3944 | Gold Bar USA | 4.2 | 3.2 | 5.4 | 6.9 | -- | -- | -- | -- | -- |
| 3945 | Hansville USA | 4.2 | 3.6 | 4.7 | 6.2 | 5.2 | 7.6 | 6 | -- | -- |
| 3946 | La Center USA | 4.2 | 3.9 | 5.8 | 8.2 | 5.9 | -- | -- | -- | -- |
| 3947 | LaCrosse USA | 4.2 | 4.4 | 5.8 | 5.4 | 5 | -- | 4.5 | 5.7 | 6.4 |
| 3948 | Lynden USA | 4.2 | 4.1 | 8 | 10.2 | 7.4 | 8.2 | 8.5 | -- | -- |
| 3949 | Maltby USA | 4.2 | 3.6 | 5.7 | 11 | 7.2 | -- | -- | -- | -- |
| 3950 | Renton USA | 4.2 | 3.5 | 5.8 | 9.6 | 6 | 6.7 | 5 | -- | -- |
| 3951 | Shelton USA | 4.2 | 3.8 | 5.2 | 7.6 | 5.6 | 9.2 | 7.6 | 9.1 | 11.9 |
| 3952 | Kelly USA | 4.2 | 7.1 | 3.5 | 3.9 | 1.6 | -- | -- | -- | -- |
| 3953 |  Comox Canada | 4.1 | 3.7 | 6.3 | 3.6 | -- | -- | -- | -- | -- |
| 3954 | Kitimat Canada | 4.1 | 3.5 | 4.6 | 4 | 3.9 | 4.6 | 5.2 | 5.4 | 4.6 |
| 3955 | Grande-Digue Canada | 4.1 | 3.7 | 5.2 | -- | -- | -- | -- | -- | -- |
| 3956 | Moncton Canada | 4.1 | 3.7 | 6.4 | 5.9 | 5.7 | 5.6 | 4.7 | 3.8 | 4.2 |
| 3957 | Dartmouth Canada | 4.1 | 5.9 | -- | -- | -- | -- | -- | -- | -- |
| 3958 | Whitehorse Canada | 4.1 | 3.9 | 5.4 | 3.7 | 6.8 | -- | -- | -- | -- |
| 3959 | Albion USA | 4.1 | 3.1 | 5.1 | 5.5 | 5 | -- | 4.6 | -- | -- |
| 3960 | Atherton USA | 4.1 | 3.9 | 5.1 | 6.7 | 7.3 | 11.9 | -- | -- | -- |
| 3961 | Brookdale USA | 4.1 | 4.1 | 7 | 7.1 | 8.4 | -- | -- | -- | -- |
| 3962 | Clearlake Riviera USA | 4.1 | 4.1 | -- | -- | -- | -- | -- | -- | -- |
| 3963 | Corte Madera USA | 4.1 | 4 | 4.8 | 6.1 | 7.3 | 9.9 | 6.1 | -- | -- |
| 3964 | Emerald Lake Hills USA | 4.1 | 4 | 6.3 | 8.3 | 8 | -- | -- | -- | -- |
| 3965 | Fortuna USA | 4.1 | 3.5 | 6.5 | 6.6 | 7 | -- | 6.7 | -- | -- |
| 3966 | Lucas Valley-Marinwood USA | 4.1 | 4 | 4.9 | 5.9 | 7.5 | -- | -- | -- | -- |
| 3967 | Meadow Vista USA | 4.1 | 4.9 | 5.8 | 8.9 | 13.1 | 17 | 7.2 | -- | -- |
| 3968 | Nicasio USA | 4.1 | 3.7 | 4.6 | 5.4 | -- | -- | -- | -- | -- |
| 3969 | Ocotillo USA | 4.1 | 4.5 | 4.6 | 5 | -- | -- | -- | -- | -- |
| 3970 | Pioneer USA | 4.1 | 3.9 | 5.6 | 6 | 12.8 | 17.2 | 6.5 | -- | -- |
| 3971 | Ross USA | 4.1 | 4.1 | 5.2 | 6.1 | 7.1 | -- | -- | -- | -- |
| 3972 | San Anselmo USA | 4.1 | 4 | 4.9 | 6.2 | 7.3 | 10.5 | 5.7 | -- | -- |
| 3973 | San Bruno USA | 4.1 | 3.7 | 5.4 | 7.1 | 7.7 | 9.5 | 5.8 | -- | -- |
| 3974 | Santa Clara USA | 4.1 | 4.8 | 6.3 | 8.6 | 8.8 | 12.1 | 7.5 | -- | -- |
| 3975 | Saratoga USA | 4.1 | 3.7 | 4.8 | 5.5 | 6.8 | 9.9 | 5.9 | -- | -- |
| 3976 | Tamalpais-Homestead Valley USA | 4.1 | 3.8 | 5 | 6.1 | 7 | -- | -- | -- | -- |
| 3977 | Temelec USA | 4.1 | 4 | 6.1 | 11.6 | 8.5 | -- | -- | -- | -- |
| 3978 | Weitchpec USA | 4.1 | 5.1 | -- | -- | -- | -- | -- | -- | -- |
| 3979 | Teller USA | 4.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3980 | Ridge Wood Heights USA | 4.1 | 4.1 | 7.2 | 6.8 | 7.2 | -- | -- | -- | -- |
| 3981 | Brandywine USA | 4.1 | 4 | 8.4 | 8.7 | 4.2 | -- | -- | -- | -- |
