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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 605 |  Dalton Gardens USA | 8.8 | 7.5 | 10.6 | 12.8 | 9.6 | -- | -- | -- | -- |
| 606 | Rock Island Arsenal USA | 8.8 | 6.5 | 11.2 | 8.8 | -- | -- | -- | -- | -- |
| 607 | Rockford USA | 8.8 | 7.5 | 12.2 | 11 | 9.8 | 9.4 | -- | -- | -- |
| 608 | Warrenville USA | 8.8 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 609 | Willowbrook USA | 8.8 | 7.9 | 14.7 | 12.7 | 13.5 | -- | -- | -- | -- |
| 610 | Des Moines USA | 8.8 | 5.6 | 9.7 | 5.9 | 10.4 | 7.2 | 7.3 | 7.4 | 8.4 |
| 611 | Hiawatha USA | 8.8 | 7.7 | 12.2 | -- | -- | -- | -- | -- | -- |
| 612 | Bel Aire USA | 8.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 613 | Fairway USA | 8.8 | 8.3 | 11.5 | -- | -- | -- | -- | -- | -- |
| 614 | Ludlow USA | 8.8 | 7.9 | 10.9 | -- | -- | -- | -- | -- | -- |
| 615 | Owensboro USA | 8.8 | 7.6 | 9.7 | 8.6 | 10.3 | 8 | 8.7 | 9 | 10.7 |
| 616 | Ann Arbor USA | 8.8 | 7.8 | 11.5 | 8.4 | 11.5 | 10.4 | 11.9 | -- | -- |
| 617 | Brighton USA | 8.8 | 11.4 | -- | -- | -- | -- | -- | -- | -- |
| 618 | Dearborn USA | 8.8 | 8.8 | 13.6 | 10.9 | 10 | 9.1 | 9.5 | 9.9 | 10 |
| 619 | Novi USA | 8.8 | 7.3 | -- | -- | -- | -- | -- | -- | -- |
| 620 | Oakland USA | 8.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 621 | International Falls USA | 8.8 | 6.5 | 9.4 | 3.9 | 5.2 | -- | -- | -- | -- |
| 622 | Rochester USA | 8.8 | 7.6 | 12.7 | 8.8 | 11.9 | 8.8 | 8.7 | 8.6 | 7.7 |
| 623 | Norfolk USA | 8.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 624 | Newark USA | 8.8 | 7.8 | 12.8 | 8.9 | 12.3 | 10.6 | 11.2 | 8.9 | 8.7 |
| 625 | Fairport USA | 8.8 | 6.9 | 10.1 | -- | -- | -- | -- | -- | -- |
| 626 | Harrisburg USA | 8.8 | 8.8 | 11.3 | 12.2 | 14.1 | -- | -- | -- | -- |
| 627 | Grand Forks USA | 8.8 | 7.6 | 10.5 | 6 | 14.4 | -- | -- | -- | -- |
| 628 | Cincinnati USA | 8.8 | 7.7 | 11.1 | 9.9 | 11.7 | 10.1 | 11.2 | 10.4 | 9.7 |
| 629 | East Cleveland USA | 8.8 | 8.2 | 10.9 | -- | -- | -- | -- | -- | -- |
| 630 | Holland USA | 8.8 | 8.3 | 11.3 | -- | -- | -- | -- | -- | -- |
| 631 | Warren USA | 8.8 | 7.8 | 10.6 | 5 | 8.6 | 6.1 | -- | -- | -- |
| 632 | Wooster USA | 8.8 | 9 | 11.3 | -- | -- | -- | -- | -- | -- |
| 633 | Hugo USA | 8.8 | 9.4 | -- | -- | -- | -- | -- | -- | -- |
| 634 | Baden USA | 8.8 | 7 | 11.9 | 12 | 12.9 | -- | -- | -- | -- |
| 635 | Chester USA | 8.8 | 7.2 | 12.2 | 11.3 | 12.4 | 10.1 | 10.6 | 11.7 | 9.5 |
| 636 | Easton USA | 8.8 | 7.2 | -- | -- | -- | -- | -- | -- | -- |
| 637 | New Freeport USA | 8.8 | 8.1 | -- | -- | -- | -- | -- | -- | -- |
| 638 | St. Clair USA | 8.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 639 | Marble Falls USA | 8.8 | 9.8 | -- | -- | -- | -- | -- | -- | -- |
| 640 | Poteet USA | 8.8 | 11.1 | 8.8 | 9.5 | -- | -- | -- | -- | -- |
| 641 | Eau Claire USA | 8.8 | 6 | 10.4 | 7.2 | 8.9 | 7.7 | 8.1 | 7.8 | 7 |
| 642 | Green Bay USA | 8.8 | 6.6 | 11 | 7.4 | 8.5 | 7.4 | 7.8 | 6.5 | 6.1 |
| 643 | Shorewood USA | 8.8 | 8.4 | 12.3 | -- | -- | -- | -- | -- | -- |
| 644 | Spring Valley USA | 8.8 | 7.4 | 11.6 | -- | -- | -- | -- | -- | -- |
| 645 |  Gibbons Canada | 8.7 | 10.1 | 16.3 | 9.6 | 9.5 | 7.7 | 8.7 | -- | -- |
| 646 | Lacombe Canada | 8.7 | 11.2 | 10.5 | -- | -- | -- | -- | -- | -- |
| 647 | Lloydminster Canada | 8.7 | 9 | 5.4 | -- | -- | -- | -- | -- | -- |
| 648 | Red Deer Canada | 8.7 | 9.5 | 13.7 | 5.9 | 6.1 | 4.8 | 6.3 | 9.7 | 7 |
| 649 | Redwater Canada | 8.7 | 9.6 | 16.8 | 7.6 | 8.5 | 5.5 | 7.9 | -- | -- |
| 650 | Aliso Viejo USA | 8.7 | 7.8 | 8.2 | 9 | 11.3 | 13.8 | -- | -- | -- |
| 651 | Auberry USA | 8.7 | 6.6 | 7.5 | 7.4 | 15.3 | -- | -- | -- | -- |
| 652 | Bishop USA | 8.7 | 5.5 | 3.6 | 2.8 | 9.2 | 12.5 | 4.5 | 8.4 | 6.5 |
| 653 | Corona USA | 8.7 | 9.1 | 8.1 | 7.5 | 9.6 | 11.2 | 9.6 | -- | -- |
| 654 | Costa Mesa USA | 8.7 | 7.6 | 9.7 | 10.4 | 11.8 | -- | -- | -- | -- |
