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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2364 |  Maryville USA | 6.4 | 6.4 | 8.3 | 7 | 7.8 | 6.6 | 7.3 | 7.5 | 8.3 |
| 2365 | Stephenville USA | 6.4 | 6 | 8.9 | 8.1 | -- | -- | -- | -- | -- |
| 2366 | Springville USA | 6.4 | 6 | 6.1 | 6.5 | 9.7 | 8.2 | 5.2 | -- | -- |
| 2367 | South Burlington USA | 6.4 | 6 | 8.1 | -- | -- | -- | -- | -- | -- |
| 2368 | Ashland USA | 6.4 | 5.9 | 10.7 | 10.1 | 11.6 | -- | -- | -- | -- |
| 2369 | Big Island USA | 6.4 | 6.4 | 6.3 | -- | -- | -- | -- | -- | -- |
| 2370 | Williamsburg USA | 6.4 | 6.1 | 10 | 8.1 | 14.8 | -- | -- | -- | -- |
| 2371 | Electric City USA | 6.4 | 5.7 | 9.3 | 8.9 | 15.7 | -- | -- | -- | -- |
| 2372 | Lake Morton-Berrydale USA | 6.4 | 5.6 | 6.1 | -- | -- | -- | -- | -- | -- |
| 2373 | Ashland USA | 6.4 | 4 | 7 | 4.4 | 6.4 | 5.3 | 5.6 | -- | -- |
| 2374 | Bayside USA | 6.4 | 4.6 | 12.1 | 7.8 | 11.1 | -- | -- | -- | -- |
| 2375 | Mount Horeb USA | 6.4 | 4.5 | 11.2 | 6.2 | 9.5 | -- | -- | -- | -- |
| 2376 |  High Prairie Canada | 6.3 | 8.2 | 18.4 | -- | -- | -- | -- | -- | -- |
| 2377 | Nelson Canada | 6.3 | 7.1 | 8.5 | -- | -- | -- | -- | -- | -- |
| 2378 | Smithers Canada | 6.3 | 6.4 | 9.7 | 7.1 | 7 | 7.4 | 11.6 | -- | -- |
| 2379 | Vernon Canada | 6.3 | 5.9 | 11.8 | 9.3 | 18.6 | 7.8 | 9.1 | -- | -- |
| 2380 | Almonte Canada | 6.3 | 5.5 | 8.5 | 3.5 | 11.4 | -- | -- | -- | -- |
| 2381 | Val-d'Or Canada | 6.3 | 5.3 | 11.3 | 5.9 | -- | -- | -- | -- | -- |
| 2382 |  Tegucigalpa Honduras | 6.3 | 15.2 | 15.1 | 10.2 | 11.8 | -- | -- | -- | -- |
| 2383 | Ahwahnee USA | 6.3 | 6 | 7.1 | 6.9 | 14.6 | -- | -- | -- | -- |
| 2384 | Alum Rock USA | 6.3 | 5.7 | 7.2 | 10.3 | 11.3 | -- | -- | -- | -- |
| 2385 | Catheys Valley USA | 6.3 | 6.1 | 6.8 | 8.1 | 12.2 | 18.8 | 7.5 | -- | -- |
| 2386 | Cobb USA | 6.3 | 6.1 | 6.3 | 3.7 | 10.2 | -- | -- | -- | -- |
| 2387 | Crescent City USA | 6.3 | 4.9 | 7.5 | 8.1 | 8.9 | 12.9 | -- | -- | -- |
| 2388 | Discovery Bay USA | 6.3 | 6.3 | 7.7 | 9.1 | 11.3 | -- | -- | -- | -- |
| 2389 | East Oakdale USA | 6.3 | 6.5 | 10.9 | 11.9 | 13.8 | -- | -- | -- | -- |
| 2390 | Happy Valley USA | 6.3 | 6 | 6.7 | 6.4 | -- | -- | -- | -- | -- |
| 2391 | Huron USA | 6.3 | 7.6 | 6.4 | 7.8 | 10 | 8.7 | 5.8 | 10.3 | 10.3 |
| 2392 | Oakhurst USA | 6.3 | 5.8 | 7.2 | 7.3 | 12.9 | 29.9 | 8.1 | -- | -- |
| 2393 | Oakley USA | 6.3 | 6.3 | 8.1 | 9.3 | 10.5 | -- | -- | -- | -- |
| 2394 | Rio Vista USA | 6.3 | 9.2 | 10.5 | 9.3 | 9.2 | 11.5 | 7.2 | 11.2 | 9.8 |
| 2395 | Riverside USA | 6.3 | 10.9 | 11.4 | 11 | 14.2 | 14.4 | 12.4 | 12.8 | 13.8 |
| 2396 | Solano USA | 6.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2397 | Swall Meadows USA | 6.3 | 5.2 | -- | -- | -- | -- | -- | -- | -- |
| 2398 | West Point USA | 6.3 | 5.5 | 6.7 | 7 | 14.2 | 17.9 | 6.4 | -- | -- |
| 2399 | Eaton USA | 6.3 | 6.9 | -- | -- | -- | -- | -- | -- | -- |
| 2400 | Fort Lauderdale USA | 6.3 | 6.4 | 9.2 | 9.3 | 9.2 | 10.1 | 8.5 | -- | -- |
| 2401 | Emmett USA | 6.3 | 5.5 | 8.7 | 8.3 | 5.2 | -- | 9.5 | -- | -- |
| 2402 | Mahomet USA | 6.3 | 6.9 | 11.4 | 2.7 | 9.1 | -- | -- | -- | -- |
| 2403 | Denton USA | 6.3 | 6.4 | 9.4 | -- | -- | -- | -- | -- | -- |
| 2404 | Bedford USA | 6.3 | 6.1 | 6.1 | -- | -- | -- | -- | -- | -- |
| 2405 | Framingham city USA | 6.3 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2406 | Lawrence USA | 6.3 | 4.6 | 6.7 | 4.8 | -- | -- | -- | -- | -- |
| 2407 | North Adams USA | 6.3 | 5.9 | 8.4 | 7.2 | 7.4 | 5.9 | 6.4 | 5.7 | -- |
| 2408 | Northampton USA | 6.3 | 5.8 | 8.4 | 7.1 | 7.7 | 6.4 | 6.9 | -- | -- |
| 2409 | Pittsfield USA | 6.3 | 5.6 | 8.4 | 7.4 | 8.7 | 7.7 | 8 | -- | -- |
| 2410 | Saugus USA | 6.3 | 5.8 | 7.5 | 5.5 | -- | -- | -- | -- | -- |
| 2411 | Somerville USA | 6.3 | 6.4 | 8.5 | 6.7 | 8.5 | -- | -- | -- | -- |
| 2412 | Woburn USA | 6.3 | 6.3 | 10.5 | -- | -- | -- | -- | -- | -- |
| 2413 | Jennings USA | 6.3 | 5.8 | 11.7 | 10 | -- | -- | -- | -- | -- |
