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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 7347 |  Lynn USA | 5.9 | 6.2 | 7.1 | 7.4 | 6.8 | 6 | 6.6 | 7 | 6.1 |
| 7348 | Suffolk USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7349 | Williamstown USA | 5.9 | 4.4 | 7.6 | 4.8 | 8.7 | -- | -- | -- | -- |
| 7350 | Missaukee USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7351 | Baxter USA | 5.9 | 5.9 | 11 | -- | -- | -- | -- | -- | -- |
| 7352 | Van Buren USA | 5.9 | 5.9 | 9.1 | 9.6 | 11.5 | -- | -- | -- | -- |
| 7353 | Deer Lodge USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7354 | West Glacier USA | 5.9 | 5.1 | 10.5 | 7.2 | 10.1 | 9 | -- | -- | -- |
| 7355 | Littleton USA | 5.9 | 5.1 | 8.2 | -- | -- | -- | -- | -- | -- |
| 7356 | Portsmouth USA | 5.9 | 5.7 | 7 | 6.2 | 7.4 | 6.8 | 6.1 | 6 | 6.1 |
| 7357 | Thornton USA | 5.9 | 6.2 | -- | -- | -- | -- | -- | -- | -- |
| 7358 | Chester USA | 5.9 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 7359 | Las Cruces USA | 5.9 | 5.4 | 4 | 3.7 | 5.5 | 6 | 4.5 | 4.8 | -- |
| 7360 | Chenango Bridge USA | 5.9 | 5.4 | 8.3 | -- | -- | -- | -- | -- | -- |
| 7361 | Woodstock USA | 5.9 | 5.1 | 8 | -- | -- | -- | -- | -- | -- |
| 7362 | Bandon USA | 5.9 | 5.9 | 8.6 | 9.4 | 8.1 | -- | -- | -- | -- |
| 7363 | Canby USA | 5.9 | 5.7 | 8.5 | 11.1 | 9.2 | -- | 10.1 | -- | -- |
| 7364 | Coburg USA | 5.9 | 5.4 | 8.1 | 9 | -- | -- | -- | -- | -- |
| 7365 | Jasper USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7366 | Lakeview USA | 5.9 | 7.3 | 7.4 | 5.1 | 8 | 8 | 6 | 11.3 | 9 |
| 7367 | Milwaukie USA | 5.9 | 5.5 | 7.5 | 11.7 | 9.2 | -- | -- | -- | -- |
| 7368 | Newport USA | 5.9 | 6.4 | 8.9 | 10.6 | 9.6 | -- | -- | -- | -- |
| 7369 | Hopwood USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7370 | Tunkhannock USA | 5.9 | 5.2 | 6 | 6.6 | 7.8 | -- | -- | -- | -- |
| 7371 | Wayne USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7372 | Clearfield USA | 5.9 | 7.2 | 6.5 | 7.4 | 13.3 | -- | -- | -- | -- |
| 7373 | East Basin USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7374 | Midvale USA | 5.9 | 7.2 | 7.3 | 8.4 | 10.7 | 9.1 | 7.6 | -- | -- |
| 7375 | Riverton USA | 5.9 | 6.4 | 7.7 | 8.3 | 11.2 | 8.7 | 6.4 | -- | -- |
| 7376 | West Valley City USA | 5.9 | 7.3 | 7.3 | 8.1 | 10.9 | 8.9 | 7.6 | -- | -- |
| 7377 | Londonderry USA | 5.9 | 5.1 | 7.1 | -- | -- | -- | -- | -- | -- |
| 7378 | Buckingham USA | 5.9 | 6.4 | 6.8 | -- | -- | -- | -- | -- | -- |
| 7379 | Moneta USA | 5.9 | 5 | 7.6 | -- | -- | -- | -- | -- | -- |
| 7380 | Colfax USA | 5.9 | 4.7 | -- | -- | -- | -- | -- | -- | -- |
| 7381 | Edgewood USA | 5.9 | 5.1 | 6.4 | 10.4 | 7.2 | -- | -- | -- | -- |
| 7382 | Green Bluff USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7383 | Lost River USA | 5.9 | 6.8 | 10.9 | 8.8 | -- | -- | -- | -- | -- |
| 7384 | Okanogan County USA | 5.9 | -- | -- | -- | -- | -- | -- | -- | -- |
| 7385 | Opportunity USA | 5.9 | 6.1 | 9 | 10.4 | -- | -- | -- | -- | -- |
| 7386 | Trentwood USA | 5.9 | 5.7 | -- | -- | -- | -- | -- | -- | -- |
| 7387 | Winthrop USA | 5.9 | 5 | 8.4 | 7.4 | 15.1 | 7.5 | 5.3 | 11.2 | 16 |
| 7388 |  Hadspen Australia | 5.8 | 5.7 | 4.7 | 6 | 6.5 | 8.7 | 9.3 | 10.2 | 9.8 |
| 7389 | Brooklyn Australia | 5.8 | 6.8 | 6.5 | -- | -- | -- | -- | -- | -- |
| 7390 |  Ardrossan Canada | 5.8 | 7.2 | 11.8 | 5.5 | 7 | 5 | 6.2 | -- | -- |
| 7391 | Jasper Park Lodge Canada | 5.8 | 6.2 | -- | -- | -- | -- | -- | -- | -- |
| 7392 | Chilliwack Canada | 5.8 | 4.8 | 5.8 | 12.3 | 7.6 | 6 | 6.6 | -- | -- |
| 7393 | Prince George Canada | 5.8 | 6 | 14.1 | 6.7 | 7.4 | 5.8 | 9 | 15.4 | 9.1 |
| 7394 | Regional District of Central Kootenay Canada | 5.8 | 6.2 | 12.1 | 2 | 25.5 | -- | -- | -- | -- |
| 7395 | North Bay Canada | 5.8 | 4.7 | 8 | 5.2 | 5.7 | 4.7 | 4.6 | 5.6 | 4.7 |
| 7396 | Rouyn-Noranda Canada | 5.8 | 4.6 | 9 | 5.9 | 6.8 | -- | -- | -- | -- |
