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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8160 |  Saint-Michel-l'Observatoire France | 5 | 4.2 | 5.4 | 6.4 | 6.6 | 6.1 | 6.6 | 6.2 | 8.4 |
| 8161 |  Munstertal/Schwarzwald Germany | 5 | 3.8 | 5 | 5.6 | 5 | 4.8 | 5.9 | -- | -- |
| 8162 |  Kópavogur Iceland | 5 | 4.7 | 4.4 | 3.7 | 4.9 | 6.9 | 6.9 | 5.8 | 5.7 |
| 8163 |  Sines Portugal | 5 | 5.4 | 7 | 9.4 | 6.8 | 6.2 | 6.8 | 5.9 | 4.9 |
| 8164 |  Eloy USA | 5 | 5.4 | 7 | 14 | 17.9 | -- | -- | -- | -- |
| 8165 | Oro Valley USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8166 | Alpine USA | 5 | 6.6 | 6.9 | 6.7 | 10.7 | 7.7 | 5.9 | 7.6 | 7.4 |
| 8167 | Alta Sierra USA | 5 | 5.1 | 5.7 | 7.5 | 16.2 | -- | -- | -- | -- |
| 8168 | Amador USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8169 | Bear Valley Springs USA | 5 | 4 | 3.6 | 2.9 | -- | -- | -- | -- | -- |
| 8170 | Big Bear Lake USA | 5 | 6.7 | 4.5 | 5 | 8.6 | 14.7 | 9.2 | -- | -- |
| 8171 | Bodega USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8172 | Bridgeport USA | 5 | 5.5 | 5.2 | 5.6 | 11.3 | -- | -- | -- | -- |
| 8173 | Brooks USA | 5 | 4.7 | 5.8 | 5.1 | 10.3 | 15.3 | 6.3 | -- | -- |
| 8174 | Campbell USA | 5 | 4.7 | 6 | 7.6 | 8.1 | 11.1 | 6.5 | -- | -- |
| 8176 | Dorrington USA | 5 | 5 | 6.1 | 5 | -- | -- | -- | -- | -- |
| 8177 | Forestville USA | 5 | 4.2 | 6.5 | 8.1 | 8.9 | -- | 7.3 | -- | -- |
| 8178 | Fremont USA | 5 | 4.7 | 6.2 | 8.3 | 8.9 | 12.2 | 7.5 | -- | -- |
| 8179 | Gasquet USA | 5 | 4.6 | 8.6 | 8.2 | 7.1 | -- | -- | -- | -- |
| 8180 | Granite Bay USA | 5 | 5 | 6.5 | 7.8 | 13.1 | 15.6 | 6.6 | -- | -- |
| 8181 | Hercules USA | 5 | 4.4 | 5 | 6.5 | 9 | 11.4 | 7.2 | -- | -- |
| 8182 | Igo USA | 5 | 5.1 | 5.9 | 6 | 27.2 | 17.4 | 5.8 | -- | -- |
| 8183 | Janesville USA | 5 | 3.7 | 1.9 | 1.1 | 39.1 | -- | -- | -- | -- |
| 8184 | Lake Almanor Country Club USA | 5 | 8.4 | -- | -- | -- | -- | -- | -- | -- |
| 8185 | Mesa Vista USA | 5 | 4.8 | 6.1 | 6.3 | -- | -- | -- | -- | -- |
| 8186 | Morgan Hill USA | 5 | 4.5 | 5.5 | 6.8 | 7.4 | 10.7 | 7.1 | -- | -- |
| 8187 | Pleasanton USA | 5 | 4.9 | 6.4 | 7.9 | 8.5 | 11.7 | 6.5 | -- | -- |
| 8188 | Reliez Valley USA | 5 | 4.6 | -- | -- | -- | -- | -- | -- | -- |
| 8189 | San Ramon USA | 5 | 4.8 | 6.3 | 7.8 | 8.5 | 12.1 | 6.8 | -- | -- |
| 8190 | Santa Maria USA | 5 | 4.8 | 5.2 | 6.5 | 7.7 | 9.3 | 6.5 | 7.1 | 7.5 |
| 8191 | Solana Beach USA | 5 | 5 | 6.4 | 7.5 | 10.9 | 12.6 | 9.6 | -- | -- |
| 8192 | Trinity Center USA | 5 | 4.9 | 5.6 | 5.7 | 27.2 | 15.6 | 6.1 | -- | -- |
| 8193 | Ukiah USA | 5 | 5 | 6 | 5.5 | 8.1 | 11.3 | 6.9 | 10.4 | 11 |
| 8194 | Avon USA | 5 | 4.4 | 3.6 | 3.6 | 8.9 | -- | -- | -- | -- |
| 8195 | Black Forest USA | 5 | 5 | 4.9 | 3.3 | 9.5 | -- | -- | -- | -- |
| 8196 | Evergreen USA | 5 | 4.8 | 4.4 | 3.1 | 9.3 | 9.2 | 6 | -- | -- |
| 8197 | Glenwood Springs USA | 5 | 3.9 | 3 | 2.5 | -- | -- | -- | -- | -- |
| 8198 | Gunbarrel USA | 5 | 5.1 | 2.8 | 4 | 11.7 | -- | -- | -- | -- |
| 8199 | Larimer USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8200 | Parachute USA | 5 | 4.4 | 3.5 | -- | -- | -- | -- | -- | -- |
| 8201 | Watkins USA | 5 | 2 | -- | -- | -- | -- | -- | -- | -- |
| 8202 | Winter Park USA | 5 | 4.8 | 4.3 | 3.4 | -- | -- | -- | -- | -- |
| 8203 | Largo USA | 5 | 4.8 | 5.4 | 3.9 | -- | -- | -- | -- | -- |
| 8204 | Silver Lake USA | 5 | 5.4 | 7.6 | 7.5 | 7.5 | -- | -- | -- | -- |
| 8205 | Vero Beach USA | 5 | 4.8 | -- | -- | -- | -- | -- | -- | -- |
| 8206 | Westchester USA | 5 | 5.5 | 4.3 | -- | -- | -- | -- | -- | -- |
| 8207 | Elmore USA | 5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 8208 | Kimberly USA | 5 | 4.6 | 5.8 | 7.6 | 12.6 | -- | -- | -- | -- |
| 8209 | Preston USA | 5 | 5.8 | 5.7 | 5.5 | 7.3 | -- | -- | -- | -- |
| 8210 | Clear Spring USA | 5 | 5.1 | 10.7 | -- | -- | -- | -- | -- | -- |
