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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2514 |  West Slope USA | 6.2 | 7.8 | -- | -- | -- | -- | -- | -- | -- |
| 2515 | State College USA | 6.2 | 6 | 9.2 | 8.2 | 9.6 | 7.3 | 9.9 | 8.7 | 9.4 |
| 2516 | Surfside Beach USA | 6.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2517 | Cookeville USA | 6.2 | 6.1 | 7.7 | 6.4 | 7.5 | 6.1 | 6.6 | 7.2 | -- |
| 2518 | Sevierville USA | 6.2 | 6.2 | 9 | 7.8 | 12.5 | -- | -- | -- | -- |
| 2519 | Duchesne USA | 6.2 | 6.1 | 4.5 | 2.8 | 8.9 | 8.7 | 4.6 | -- | -- |
| 2520 | Murray USA | 6.2 | 7.5 | 7.6 | 8.4 | 10.8 | 9.3 | 7.8 | -- | -- |
| 2521 | Smithfield USA | 6.2 | 7.1 | 8.5 | 7.8 | -- | -- | -- | -- | -- |
| 2522 | South Jordan USA | 6.2 | 6.8 | 7.3 | 6.7 | 10.4 | 9.1 | 6.9 | -- | -- |
| 2523 | Stowe USA | 6.2 | 5.1 | 6.6 | -- | -- | -- | -- | -- | -- |
| 2524 | Alexandria USA | 6.2 | 6.2 | 10.4 | 9.3 | 9.3 | 6.9 | 7.5 | 6.6 | 6.8 |
| 2525 | Blacksburg USA | 6.2 | 6.6 | 10.7 | 8.8 | 10.5 | -- | -- | -- | -- |
| 2526 | Roanoke USA | 6.2 | 5.7 | 10.1 | 9.7 | 11.8 | -- | -- | -- | -- |
| 2527 | Vinton USA | 6.2 | 6.1 | 8.4 | 7.5 | 8.3 | 7.1 | 7.6 | 7.1 | 6.7 |
| 2528 | Harpers Ferry USA | 6.2 | 6.5 | 10.7 | 10.4 | 13.1 | 10.9 | 12.5 | -- | -- |
| 2529 |  Exshaw Canada | 6.1 | 5.8 | 10 | -- | -- | -- | -- | -- | -- |
| 2530 | Grande Cache Canada | 6.1 | 4.9 | 12.6 | 4.8 | 12.3 | -- | -- | -- | -- |
| 2531 | Chetwynd Canada | 6.1 | 6.7 | 16.7 | 6.7 | 4.5 | -- | -- | -- | -- |
| 2532 | Crawford Bay Canada | 6.1 | 6.8 | 6.4 | -- | -- | -- | -- | -- | -- |
| 2533 | Kimberley Canada | 6.1 | 6.3 | 9.9 | 18.7 | -- | -- | -- | -- | -- |
| 2534 | Mica Creek Canada | 6.1 | 5.4 | 10.6 | -- | -- | -- | -- | -- | -- |
| 2535 | Rossland Canada | 6.1 | 6.9 | 10.9 | 8.8 | 27.8 | -- | -- | -- | -- |
| 2536 | Shawnigan Lake Canada | 6.1 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2537 | Summerland Canada | 6.1 | 5 | 15 | -- | -- | -- | -- | -- | -- |
| 2538 | Kingston Canada | 6.1 | 5.2 | 9.1 | 6.8 | 7.8 | 5.9 | 5.8 | 5.7 | 5.6 |
| 2539 | Outlook Canada | 6.1 | 7.1 | 11.6 | 5.9 | 8.5 | -- | -- | -- | -- |
| 2540 |  San Jose Costa Rica | 6.1 | 5.4 | 6.1 | 7.9 | 7.8 | 8.2 | 10.4 | -- | -- |
| 2541 | Goodyear USA | 6.1 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 2542 | Angels USA | 6.1 | 6.2 | -- | -- | -- | -- | -- | -- | -- |
| 2544 | Eureka USA | 6.1 | 3.9 | 5.7 | 5.9 | 7 | 10.9 | 6.7 | -- | -- |
| 2545 | Lake Arrowhead USA | 6.1 | 6.9 | 6.1 | 4.9 | 7.2 | 9.4 | 7.6 | -- | -- |
| 2546 | Mather USA | 6.1 | 6.2 | 7.9 | 10.2 | -- | -- | -- | -- | -- |
| 2547 | Mount Shasta USA | 6.1 | 6.3 | 7.9 | 8 | 17.5 | 14.4 | 9.1 | -- | -- |
| 2548 | San Juan Capistrano USA | 6.1 | 4.6 | 7.2 | 7 | 10.7 | 12.1 | 9.7 | -- | -- |
| 2549 | Tehachapi USA | 6.1 | 4.1 | 4.2 | 4.6 | 10.4 | 14.6 | 7.1 | -- | -- |
| 2550 | Valley Center USA | 6.1 | 6.2 | 7.2 | 7.2 | 7.5 | -- | -- | -- | -- |
| 2551 | Yermo USA | 6.1 | 6.9 | 4.4 | 3.3 | 6.4 | -- | 5 | -- | -- |
| 2552 | Broomfield USA | 6.1 | 6.3 | 6.4 | 5.2 | 11.2 | -- | -- | -- | -- |
| 2553 | Burlington USA | 6.1 | 7 | 8.1 | -- | -- | -- | -- | -- | -- |
| 2554 | Dove Creek USA | 6.1 | 4.6 | 4.6 | -- | -- | -- | -- | -- | -- |
| 2555 | Edgewater USA | 6.1 | 6.5 | 6.9 | 6 | 9.7 | -- | -- | -- | -- |
| 2556 | Fort Morgan USA | 6.1 | 5.8 | 5.8 | 4.6 | 10.3 | -- | -- | -- | -- |
| 2557 | Highlands Ranch USA | 6.1 | 6 | 6.1 | 4.2 | 9.9 | -- | -- | -- | -- |
| 2558 | Kremmling USA | 6.1 | 5.2 | 7.8 | 12 | 15.2 | -- | -- | -- | -- |
| 2559 | Welby USA | 6.1 | 7.9 | 12.4 | 15.5 | 15.5 | -- | -- | -- | -- |
| 2560 | Norwich USA | 6.1 | 6.1 | 9.8 | -- | -- | -- | -- | -- | -- |
| 2561 | Tolland USA | 6.1 | 5.5 | 7.8 | -- | -- | -- | -- | -- | -- |
| 2562 | Milton USA | 6.1 | 5.2 | -- | -- | -- | -- | -- | -- | -- |
| 2563 | Pace USA | 6.1 | 6.8 | 9.8 | 8.3 | -- | -- | -- | -- | -- |
| 2564 | Wilton Manors USA | 6.1 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
