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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 305 |  Terra Bella USA | 9.7 | 10.2 | 13.1 | -- | -- | -- | -- | -- | -- |
| 306 | Tustin USA | 9.7 | 7.9 | 8.5 | 9.2 | 12.1 | -- | -- | -- | -- |
| 307 | Pinehurst USA | 9.7 | 9.7 | 10.3 | 9.8 | 10.9 | 11.8 | 9.1 | 12.7 | 14.8 |
| 308 | Chicago USA | 9.7 | 8.4 | 13 | 11.8 | 13.4 | 11.1 | 12.8 | 9.4 | 6.7 |
| 309 | South Elgin USA | 9.7 | 8.6 | -- | -- | -- | -- | -- | -- | -- |
| 310 | Stockton USA | 9.7 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 311 | French Settlement USA | 9.7 | 10 | 11.7 | 10.4 | 9.6 | 9.5 | 9.5 | -- | -- |
| 312 | Mankato USA | 9.7 | 7.8 | 12.4 | 9.3 | 12.7 | -- | -- | -- | -- |
| 313 | Ottawa Hills USA | 9.7 | 7.9 | -- | -- | -- | -- | -- | -- | -- |
| 314 | Bellevue USA | 9.7 | 8.8 | 12.1 | -- | -- | -- | -- | -- | -- |
| 315 | Glassport USA | 9.7 | 7.8 | 12.7 | 13 | 15.4 | -- | -- | -- | -- |
| 316 | Sierra View USA | 9.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 317 | Farmers Branch USA | 9.7 | 10.4 | 11.9 | 11.4 | 12.4 | -- | -- | -- | -- |
| 318 | Nitro USA | 9.7 | 10.5 | -- | -- | -- | -- | -- | -- | -- |
| 319 | Chilton USA | 9.7 | 7.2 | -- | -- | -- | -- | -- | -- | -- |
| 320 | Weston USA | 9.7 | 7 | 11.1 | -- | -- | -- | -- | -- | -- |
| 321 |  Markham Canada | 9.6 | 8.3 | 12.1 | 11.2 | 11.7 | -- | -- | -- | -- |
| 322 | Windsor Canada | 9.6 | 8.4 | 12 | 8.5 | 9 | 8.1 | 8.2 | 8.6 | 8 |
| 323 | Regina Canada | 9.6 | 7.9 | 10.8 | 6.2 | 9.3 | 7.8 | 8.4 | -- | -- |
| 324 | Duarte USA | 9.6 | 9.2 | 10.5 | 9.9 | 14 | 18 | 13.2 | -- | -- |
| 325 | Mead Valley USA | 9.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 326 | Pomona USA | 9.6 | 11.1 | 12.9 | 13 | 15.8 | 17 | 14.5 | -- | -- |
| 327 | Rancho Cucamonga USA | 9.6 | 10 | 10.8 | 10.8 | 14.6 | -- | -- | -- | -- |
| 328 | Cartersville USA | 9.6 | 9.1 | 13 | 12.7 | 14.4 | 11.6 | 14 | -- | -- |
| 329 | Barrington Hills USA | 9.6 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 330 | East St. Louis USA | 9.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 331 | Hammond USA | 9.6 | 8.2 | 12.6 | 9.5 | 10 | 9.2 | 10.9 | 9.9 | -- |
| 332 | Detroit USA | 9.6 | 8.4 | 12.9 | 10 | 12.3 | 9.8 | 9.9 | 9.4 | 9.1 |
| 333 | Durand USA | 9.6 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 334 | Elmwood Place USA | 9.6 | 8.5 | 11.8 | -- | -- | -- | -- | -- | -- |
| 335 | Ben Avon USA | 9.6 | 7.4 | 11.1 | 9.5 | 12.9 | -- | -- | -- | -- |
| 336 | West Elizabeth USA | 9.6 | 8.5 | 13.1 | 13.5 | -- | -- | -- | -- | -- |
| 337 | Brookings USA | 9.6 | 5.5 | 6.6 | 5.1 | 7 | 8.5 | -- | -- | -- |
| 338 | Cleveland USA | 9.6 | 8.9 | 12.6 | 14.6 | -- | -- | -- | -- | -- |
| 339 | Hackberry USA | 9.6 | 12.9 | -- | -- | -- | -- | -- | -- | -- |
| 340 | Port Arthur USA | 9.6 | 10.6 | 10 | 8.5 | 7.8 | 9 | 8.7 | 10.2 | 8.9 |
| 341 | Behchoko Canada | 9.5 | 6.8 | 27.2 | -- | -- | -- | -- | -- | -- |
| 342 | Bluewater Canada | 9.5 | 7.5 | 12.7 | -- | -- | -- | -- | -- | -- |
| 343 | Kitchener Canada | 9.5 | 7.9 | 11.5 | 8.1 | 8.4 | 6.9 | 6.8 | 7.5 | 7.3 |
| 344 | Niagara on the Lake Canada | 9.5 | 7.7 | 8 | -- | -- | -- | -- | -- | -- |
| 345 |  Cozumel Mexico | 9.5 | 10.3 | 7.6 | -- | -- | -- | -- | -- | -- |
| 346 | Chowchilla USA | 9.5 | 8.3 | 9.9 | 12.5 | 16.2 | -- | -- | -- | -- |
| 347 | Chula Vista USA | 9.5 | 9.7 | 10.3 | 10 | 13.5 | -- | -- | -- | -- |
| 348 | Cypress USA | 9.5 | 13.2 | 12.2 | 10.9 | 27.2 | -- | -- | -- | -- |
| 349 | La Cañada Flintridge USA | 9.5 | 9 | 10 | 10.1 | 12.8 | 15.5 | 12.3 | -- | -- |
| 350 | La Verne USA | 9.5 | 10.9 | 11.2 | 10.4 | 15.1 | -- | -- | -- | -- |
| 351 | Lake City USA | 9.5 | 8.8 | 9.5 | 8.6 | 8.3 | 9.3 | 9 | 8.5 | 9.2 |
| 352 | St. Maries USA | 9.5 | -- | -- | -- | -- | -- | -- | -- | -- |
| 353 | Chesterton USA | 9.5 | 7.7 | 11.3 | 10.2 | -- | -- | -- | -- | -- |
| 354 | Michigan City USA | 9.5 | 7.7 | 13.5 | 13 | -- | -- | -- | -- | -- |
