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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7500 |  Calamba Philippines | 5.7 | 9.2 | 8.2 | 12.4 | 13.7 | 5.7 | 4 | 9.3 | -- |
| 7501 |  Salamanca Spain | 5.7 | 4.4 | 5.2 | 8.9 | 6.8 | 5.4 | -- | -- | -- |
| 7502 | Villa del Prado Spain | 5.7 | 7.7 | 7.4 | 8.9 | 10.3 | 10.8 | 11.1 | 10.8 | 9.4 |
| 7503 |  Sierre Switzerland | 5.7 | 6.2 | -- | -- | -- | -- | -- | -- | -- |
| 7504 |  Harmondsworth United Kingdom | 5.7 | 5.2 | 6.8 | 7.8 | 6.4 | 4.8 | 4.3 | -- | -- |
| 7505 |  North Pole USA | 5.7 | 7.3 | 7.5 | 12 | 9.6 | -- | 14.7 | 10.9 | 14.9 |
| 7506 | Cottonwood USA | 5.7 | 5.4 | 4 | 2.2 | 5.4 | -- | -- | -- | -- |
| 7507 | San Carlos USA | 5.7 | 6.8 | 5.2 | 4.3 | 6.5 | -- | -- | -- | -- |
| 7508 | Surprise USA | 5.7 | 5.5 | 4.9 | 7.2 | 6.1 | 6.5 | 4.1 | -- | -- |
| 7509 | Bend USA | 5.7 | 6.1 | -- | -- | -- | -- | -- | -- | -- |
| 7510 | Borrego Springs USA | 5.7 | 4.7 | 3.8 | 1.8 | -- | -- | -- | -- | -- |
| 7511 | Cameron Park USA | 5.7 | 5.6 | 7.1 | 8.7 | 17.3 | 17 | 8.3 | -- | -- |
| 7512 | Concord USA | 5.7 | 5.3 | 6.4 | 7.8 | 9.2 | 11.7 | 6.5 | 13.3 | 12.4 |
| 7513 | Felton USA | 5.7 | 5.4 | 6.6 | 7.1 | 8.7 | 11.3 | 5.9 | 7.7 | 7.7 |
| 7514 | Fort Irwin USA | 5.7 | 6.1 | 4.3 | 2.6 | 6.3 | -- | -- | -- | -- |
| 7515 | Jackson USA | 5.7 | 5.4 | 6.7 | 7.1 | 11.4 | 15 | 6.2 | -- | -- |
| 7516 | Meiners Oaks USA | 5.7 | 4.7 | -- | -- | -- | -- | -- | -- | -- |
| 7517 | Stevenson Ranch USA | 5.7 | 5.9 | 8.3 | 6.1 | 9.2 | 11.7 | 8.8 | -- | -- |
| 7519 | Zayante USA | 5.7 | 5.9 | -- | -- | -- | -- | -- | -- | -- |
| 7520 | Clifton USA | 5.7 | 5 | 3.7 | 3.8 | 8.1 | 8.1 | 4.4 | -- | -- |
| 7521 | Longmont USA | 5.7 | 5.8 | 6.7 | 5.4 | 10.3 | 9.7 | 7.8 | -- | -- |
| 7522 | Enfield USA | 5.7 | 4.8 | 8.7 | 6.4 | -- | -- | -- | -- | -- |
| 7523 | Sarasota USA | 5.7 | 5.3 | 7.2 | 6.9 | 11.3 | 8.8 | -- | -- | -- |
| 7524 | Grangeville USA | 5.7 | 7.9 | 7.1 | 8.3 | 9 | 8.7 | 5.8 | 6.4 | 8.8 |
| 7525 | McCall USA | 5.7 | 8.9 | 6.3 | 9.1 | 12.9 | 10.3 | 7.4 | 7.8 | 11 |
| 7526 | Augusta USA | 5.7 | 6 | 8.1 | -- | -- | -- | -- | -- | -- |
| 7527 | Lewiston USA | 5.7 | 4.7 | 5.3 | 15.5 | 13.8 | 5.6 | 5.7 | 5.3 | 8.4 |
| 7528 | Leonardtown USA | 5.7 | 5.8 | 10 | 8.8 | 11.6 | -- | -- | -- | -- |
| 7529 | Millington USA | 5.7 | 4.7 | 6.4 | 6.3 | 5.6 | 4.8 | 6.1 | 6.8 | 8.7 |
| 7530 | Ashfield USA | 5.7 | 2.2 | -- | -- | -- | -- | -- | -- | -- |
| 7531 | Hanson USA | 5.7 | 5.7 | 8.3 | -- | -- | -- | -- | -- | -- |
| 7532 | Maynard USA | 5.7 | 6.3 | 7.8 | -- | -- | -- | -- | -- | -- |
| 7533 | Medford USA | 5.7 | 5.9 | 5.4 | 1.3 | 8.8 | -- | -- | -- | -- |
| 7534 | Milton USA | 5.7 | 5.2 | 8.3 | 6.5 | -- | -- | -- | -- | -- |
| 7535 | Newton USA | 5.7 | 5.2 | 7.8 | 6.7 | 9 | -- | -- | -- | -- |
| 7536 | Greenville USA | 5.7 | 7.3 | 9.3 | -- | -- | -- | -- | -- | -- |
| 7537 | Crosby USA | 5.7 | 4.1 | 9.2 | 4.6 | 6.8 | -- | -- | -- | -- |
| 7538 | Grand Marais USA | 5.7 | 3.5 | 7.4 | 4.3 | 9.1 | -- | -- | -- | -- |
| 7539 | Moberly USA | 5.7 | 4.9 | 8.2 | 5 | -- | -- | -- | -- | -- |
| 7540 | Greenough USA | 5.7 | 13.5 | -- | -- | -- | -- | -- | -- | -- |
| 7541 | Ogallala USA | 5.7 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 7542 | Hawthorne USA | 5.7 | 5.5 | 5.6 | 4.5 | 16.3 | -- | -- | -- | -- |
| 7543 | Alstead USA | 5.7 | 4.9 | 1.6 | 5.5 | 6.9 | -- | -- | -- | -- |
| 7544 | Brentwood USA | 5.7 | 5.3 | 7.6 | 6.6 | 7.8 | -- | -- | -- | -- |
| 7545 | Oceanville USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7546 | Cooperstown USA | 5.7 | 5 | 8 | -- | -- | -- | -- | -- | -- |
| 7547 | Liverpool USA | 5.7 | 4.2 | 8.3 | -- | -- | -- | -- | -- | -- |
| 7548 | New Baltimore USA | 5.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7549 | Noyack USA | 5.7 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 7550 | Roanoke Rapids USA | 5.7 | 5.9 | 1.4 | 0.6 | 2.9 | -- | 7.1 | -- | -- |
