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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1305 |  Mercer USA | 7.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1306 | Watsessing USA | 7.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1307 | Ballston Spa USA | 7.7 | 7.1 | 10.9 | -- | -- | -- | -- | -- | -- |
| 1308 | Churchville USA | 7.7 | 7.1 | 11.2 | -- | -- | -- | -- | -- | -- |
| 1309 | Dix Hills USA | 7.7 | 7 | 6 | -- | -- | -- | -- | -- | -- |
| 1310 | Kinderhook USA | 7.7 | 7.4 | -- | -- | -- | -- | -- | -- | -- |
| 1311 | Mexico USA | 7.7 | 6.9 | -- | -- | -- | -- | -- | -- | -- |
| 1312 | Waterloo USA | 7.7 | 6.5 | -- | -- | -- | -- | -- | -- | -- |
| 1313 | Durham USA | 7.7 | 7.9 | 11.4 | 10.2 | 11.6 | 8.9 | 10.5 | 8.5 | 8.8 |
| 1314 | Greensboro USA | 7.7 | 8 | 10.3 | 7.8 | 8.2 | 7.5 | 9.5 | 7.6 | 8.1 |
| 1315 | Mebane USA | 7.7 | 7.2 | 10.8 | -- | -- | -- | -- | -- | -- |
| 1316 | Dunn Center USA | 7.7 | 6.6 | 9.4 | 5.4 | 7.5 | 3.5 | -- | -- | -- |
| 1317 | Akron USA | 7.7 | 7.3 | 10.6 | 8.8 | 11.5 | 10.6 | 11.3 | 9 | 8.8 |
| 1318 | Ironton USA | 7.7 | 6.9 | 9.4 | 7.3 | 9.4 | 7.7 | 7.1 | 6.9 | 6.5 |
| 1319 | New Paris USA | 7.7 | 7.1 | 10 | 7.3 | 9.4 | 7.9 | 8.9 | 9.3 | 8 |
| 1320 | Broken Arrow USA | 7.7 | 8.4 | 11.3 | 9.2 | 11.7 | 9.9 | 11.8 | -- | -- |
| 1321 | McAlester USA | 7.7 | 8 | 9.5 | 9.9 | 10.2 | 8.5 | 8.6 | 8.9 | 8.3 |
| 1322 | Deschutes River Woods USA | 7.7 | 12.1 | 14.1 | 20.2 | -- | -- | -- | -- | -- |
| 1323 | Fort Washington USA | 7.7 | 8.1 | 11.5 | 9.1 | 21.3 | -- | -- | -- | -- |
| 1324 | Gettysburg USA | 7.7 | 8.2 | 12.7 | 11.2 | 12.9 | -- | -- | -- | -- |
| 1325 | North East USA | 7.7 | 7.6 | -- | -- | -- | -- | -- | -- | -- |
| 1326 | Sutersville USA | 7.7 | 7.5 | 11.7 | 9.4 | -- | -- | -- | -- | -- |
| 1327 | Wilkes-Barre USA | 7.7 | 7.4 | 10.9 | 7.8 | 10.4 | -- | -- | -- | -- |
| 1328 | Hanahan USA | 7.7 | 7.3 | 9.8 | -- | -- | -- | -- | -- | -- |
| 1329 | Lancaster USA | 7.7 | 7.9 | 11.9 | 11.1 | 13 | -- | -- | -- | -- |
| 1330 | Houston USA | 7.7 | 8.4 | 10.6 | 10.1 | 11.1 | 10.4 | 10.8 | 9.7 | 9 |
| 1331 | Missouri City USA | 7.7 | 8.7 | 9.1 | -- | -- | -- | -- | -- | -- |
| 1332 | Tomball USA | 7.7 | 8.4 | 11.4 | 10.6 | 11.8 | -- | -- | -- | -- |
| 1333 | Wylie USA | 7.7 | 7.5 | -- | -- | -- | -- | -- | -- | -- |
| 1334 | Stephens City USA | 7.7 | 7.3 | 10.6 | 7.4 | 9 | -- | -- | -- | -- |
| 1335 | Davenport USA | 7.7 | 5.4 | 6.9 | 9.1 | 17.6 | -- | -- | -- | -- |
| 1336 | Elk USA | 7.7 | 6.6 | 10.8 | 10.8 | -- | -- | -- | -- | -- |
| 1337 | Pasco USA | 7.7 | 6.9 | 9.9 | 11.5 | 11.5 | -- | -- | -- | -- |
| 1338 | Chapmanville USA | 7.7 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1339 | Weirton USA | 7.7 | 6.8 | 5.6 | -- | -- | -- | -- | -- | -- |
| 1340 | Horicon USA | 7.7 | 5.6 | 10.1 | 7.4 | 8.4 | 7.7 | 8.1 | 7.7 | 6 |
| 1341 |  Bruderheim Canada | 7.6 | 9.8 | 14.9 | 7.4 | 8.4 | 6.1 | 7.7 | 10.7 | 7 |
| 1342 | Medicine Hat Canada | 7.6 | 6.9 | 11.7 | 5.1 | 6.6 | 5.2 | 5 | 7.1 | 5.9 |
| 1343 | Orillia Canada | 7.6 | 6.4 | 9.4 | -- | -- | -- | -- | -- | -- |
| 1344 | Peterborough Canada | 7.6 | 5.6 | 9.6 | 7 | 7.7 | 6.3 | 6.1 | 6.4 | 6 |
| 1345 | Waterloo Canada | 7.6 | 5.7 | 8.5 | -- | -- | -- | -- | -- | -- |
| 1346 | Ashland USA | 7.6 | 5.9 | 7.9 | -- | -- | -- | -- | -- | -- |
| 1347 | Leeds USA | 7.6 | 8.9 | 11 | 9.4 | 10.4 | -- | 11.2 | 9.7 | 9.1 |
| 1348 | Waldo USA | 7.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1349 | Fayetteville USA | 7.6 | 6.9 | 8 | 6.7 | 8.1 | 6.9 | -- | -- | -- |
| 1350 | Rogers USA | 7.6 | 6.9 | 9.3 | -- | -- | -- | -- | -- | -- |
| 1351 | Bella Vista USA | 7.6 | 6.2 | 11.9 | 2.5 | 22.8 | -- | -- | -- | -- |
| 1352 | Hasley Canyon USA | 7.6 | 5.2 | -- | -- | -- | -- | -- | -- | -- |
| 1353 | Huntington Beach USA | 7.6 | 7.3 | 8 | 10.1 | 13.4 | -- | -- | -- | -- |
| 1355 | Westlake Village USA | 7.6 | 7.8 | 7.6 | 7.7 | 11.2 | -- | -- | -- | -- |
