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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1407 |  Nesquehoning USA | 7.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1408 | Trainer USA | 7.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1409 | Awendaw USA | 7.6 | 6.6 | 8 | 7.1 | 6.4 | 6.2 | 6.4 | 6.1 | 7.9 |
| 1410 | Greenville USA | 7.6 | 7.7 | 10.2 | 8.7 | 9.3 | 7.8 | 8.6 | 7.4 | 9 |
| 1411 | Lexington USA | 7.6 | 7.9 | 12.3 | 12 | -- | -- | -- | -- | -- |
| 1412 | Jackson USA | 7.6 | 6.8 | 9.6 | 8.9 | 8.2 | 6.8 | -- | -- | -- |
| 1413 | Mascot USA | 7.6 | 8 | 11.9 | 10.9 | -- | -- | -- | -- | -- |
| 1414 | Galena Park USA | 7.6 | 8.5 | 11.9 | 12 | 12.6 | -- | -- | -- | -- |
| 1415 | Chatham USA | 7.6 | 6.5 | 8.2 | -- | -- | -- | -- | -- | -- |
| 1416 | Falls Church USA | 7.6 | 7.9 | 12.8 | 11.2 | 13 | -- | -- | -- | -- |
| 1417 | Waynesboro USA | 7.6 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 1418 | Wise USA | 7.6 | 6.4 | 6.8 | -- | -- | -- | -- | -- | -- |
| 1419 | Wytheville USA | 7.6 | 7.3 | 9.9 | -- | -- | -- | -- | -- | -- |
| 1420 | Spokane USA | 7.6 | 7 | 10.8 | 12.1 | 11.6 | 11.1 | 8.1 | 10.6 | 10.9 |
| 1421 | Sunnyside USA | 7.6 | 7.2 | 9.5 | 11 | 10.2 | -- | 11 | 12.5 | 17.3 |
| 1422 | Parsons USA | 7.6 | 10.3 | -- | -- | -- | -- | -- | -- | -- |
| 1423 | Oak Creek USA | 7.6 | 6 | 11.3 | -- | -- | -- | -- | -- | -- |
| 1424 |  Calgary Canada | 7.5 | 8 | 11.7 | 6.3 | 8.4 | 5.9 | 6.9 | 10.9 | 7.5 |
| 1425 | Strathmore Canada | 7.5 | 7.5 | 10.9 | 5.9 | 6.9 | -- | -- | -- | -- |
| 1426 | Wainwright Canada | 7.5 | 8.6 | 15.7 | 8.1 | 12.2 | -- | -- | -- | -- |
| 1427 | Fruitvale Canada | 7.5 | 6.7 | 9.6 | 10.4 | 14.4 | -- | -- | -- | -- |
| 1428 | Lake Country Canada | 7.5 | 6.5 | 11.4 | -- | -- | -- | -- | -- | -- |
| 1429 | Mississauga Canada | 7.5 | 7 | 10.9 | 8.3 | 9.7 | 6.9 | 6.9 | 7.4 | 7.2 |
| 1430 | Baldwin USA | 7.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1431 | Madison USA | 7.5 | 6.4 | 10 | 9.6 | 11.7 | 10 | 11.3 | -- | -- |
| 1432 | Citrus Heights USA | 7.5 | 7.2 | 8.9 | 10.8 | 14.5 | -- | -- | -- | -- |
| 1433 | Laguna Niguel USA | 7.5 | 7 | 8.1 | 6.8 | 11.2 | -- | -- | -- | -- |
| 1434 | Santa Paula USA | 7.5 | 7 | 8.2 | 8.7 | 11 | -- | -- | -- | -- |
| 1435 | Torrance USA | 7.5 | 7.6 | 9.2 | 11.6 | 13.3 | 14.4 | 11.6 | -- | -- |
| 1436 | Yuba City USA | 7.5 | 7 | 8 | 10.4 | 13.2 | 19.4 | 9.6 | 18.2 | 12.6 |
| 1437 | Homestead USA | 7.5 | 7.4 | 8.1 | 7.4 | 8 | 8.3 | 8.1 | 8.8 | -- |
| 1438 | Crawfordville USA | 7.5 | 11.8 | 5.3 | 9.2 | 12.6 | -- | -- | -- | -- |
| 1439 | Watkinsville USA | 7.5 | 7.1 | 11.1 | 10.1 | 12.8 | -- | -- | -- | -- |
| 1440 | Coeur d'Alene USA | 7.5 | 7.2 | 10.2 | 11.1 | 11.8 | -- | -- | -- | -- |
| 1441 | Nampa USA | 7.5 | 11.7 | 7.3 | 12 | 13.2 | 10.2 | 6.7 | 8.6 | 11.2 |
| 1442 | Bedford USA | 7.5 | 6.6 | 8.1 | 10.1 | -- | -- | -- | -- | -- |
| 1443 | Boggstown USA | 7.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1444 | Kokomo USA | 7.5 | 6.8 | 9 | 8.1 | 7.9 | -- | 8.3 | 8.2 | 8.8 |
| 1445 | Middlebury USA | 7.5 | 7.7 | 12.6 | -- | -- | -- | -- | -- | -- |
| 1446 | Leawood USA | 7.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1447 | Anchorage USA | 7.5 | 7.2 | -- | -- | -- | -- | -- | -- | -- |
| 1448 | Paducah USA | 7.5 | 6.9 | 9.1 | 9.3 | 9.7 | 8.8 | 9.4 | 9.8 | -- |
| 1449 | Capitol Heights USA | 7.5 | 7.7 | 12.4 | 11.5 | 13.2 | -- | -- | -- | -- |
| 1450 | Keedysville USA | 7.5 | 7.3 | 10.2 | -- | -- | -- | -- | -- | -- |
| 1451 | Birmingham USA | 7.5 | 6.6 | 9.7 | 1.7 | 12.1 | -- | -- | -- | -- |
| 1452 | Byron USA | 7.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1453 | Fraser USA | 7.5 | 5.8 | 12.8 | 11.5 | 6.7 | -- | 8 | -- | -- |
| 1454 | Duluth USA | 7.5 | 5.4 | 8.4 | 5.1 | 9.1 | 6.3 | 5.8 | 5.6 | 5.5 |
| 1455 | Hastings USA | 7.5 | 8.5 | 9.3 | 7.6 | 12.4 | -- | -- | -- | -- |
| 1456 | Pierz USA | 7.5 | 4.9 | 10.1 | -- | -- | -- | -- | -- | -- |
