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 (concentration in μg/m3 categorized by WHO guideline)
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1507 |  Oshawa Canada | 7.4 | 6 | 8.5 | 6 | 6.5 | 6.5 | 6.2 | 6.6 | 6.6 |
| 1508 | Delmont Canada | 7.4 | 5.7 | 7.8 | -- | -- | -- | -- | -- | -- |
| 1509 | Deschambault Canada | 7.4 | 5.5 | 6.8 | 5.7 | 5.7 | -- | -- | -- | -- |
| 1510 | Drummondville Canada | 7.4 | 6.2 | 7.9 | -- | -- | -- | -- | -- | -- |
| 1511 |  George Town Cayman Islands | 7.4 | 8.5 | 7 | -- | -- | -- | -- | -- | -- |
| 1512 |  Calipatria USA | 7.4 | 7 | 10.1 | 10.5 | 7.3 | 9.4 | 6.5 | -- | -- |
| 1513 | Carlsbad USA | 7.4 | 6.8 | 7.9 | 8.6 | 11.2 | -- | -- | -- | -- |
| 1514 | Encinitas USA | 7.4 | 7 | 8.4 | 8.4 | 10.6 | 12.2 | 9.7 | -- | -- |
| 1515 | Escalon USA | 7.4 | 7.1 | 14.9 | 12.8 | 16.3 | 20.5 | 10.2 | -- | -- |
| 1516 | Hayfork USA | 7.4 | 7.1 | 10.7 | 14.2 | 47.8 | -- | -- | -- | -- |
| 1517 | Hemet USA | 7.4 | 7.2 | 8.7 | 8.3 | 9.9 | -- | -- | -- | -- |
| 1518 | Irvine USA | 7.4 | 7 | 7.9 | 8.4 | 10.9 | 12.4 | 9.8 | -- | -- |
| 1519 | Los Molinos USA | 7.4 | 6 | 6.1 | 8.4 | 15.1 | -- | -- | -- | -- |
| 1520 | Rancho Palos Verdes USA | 7.4 | 7.4 | 7.6 | 8.3 | 10.5 | 12.6 | 10.3 | -- | -- |
| 1521 | Rolling Hills USA | 7.4 | 7.7 | -- | -- | -- | -- | -- | -- | -- |
| 1522 | Santa Rosa Valley USA | 7.4 | 5 | -- | -- | -- | -- | -- | -- | -- |
| 1523 | New Milford USA | 7.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1524 | Wauregan USA | 7.4 | 7.1 | 10.3 | -- | -- | -- | -- | -- | -- |
| 1525 | Middletown USA | 7.4 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 1526 | Gulfport USA | 7.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1527 | Valrico USA | 7.4 | 8.1 | -- | -- | -- | -- | -- | -- | -- |
| 1528 | Hiawassee USA | 7.4 | 6.4 | -- | -- | -- | -- | -- | -- | -- |
| 1529 | Thomaston USA | 7.4 | 6.4 | 10.3 | 9.3 | 10.8 | -- | -- | -- | -- |
| 1530 | Plummer USA | 7.4 | 7.7 | 7.8 | 8.8 | 10 | 10.9 | 6.6 | -- | -- |
| 1531 | Columbus USA | 7.4 | 6.7 | 8.5 | 7.1 | 8 | -- | 7.4 | 7.6 | 7.3 |
| 1532 | Clinton USA | 7.4 | 7 | 14 | 12.5 | 12.8 | -- | 9.3 | 9.5 | 12.2 |
| 1533 | Wamego USA | 7.4 | 8.2 | 7.2 | -- | -- | -- | -- | -- | -- |
| 1534 | Fayette USA | 7.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1535 | Milford Mill USA | 7.4 | 7.7 | 10.4 | -- | -- | -- | -- | -- | -- |
| 1536 | Parkville USA | 7.4 | 8.1 | 13.3 | 11.7 | 3.8 | -- | -- | -- | -- |
| 1537 | Severn USA | 7.4 | 5.3 | -- | -- | -- | -- | -- | -- | -- |
| 1538 | Easthampton USA | 7.4 | 7.1 | 9.2 | -- | -- | -- | -- | -- | -- |
| 1539 | Alpena USA | 7.4 | 6.1 | 10.1 | -- | -- | -- | -- | -- | -- |
| 1540 | Boyne City USA | 7.4 | 4.9 | 9.7 | 8.2 | 9.1 | -- | -- | -- | -- |
| 1541 | Midland USA | 7.4 | 6.6 | 11.5 | 9 | 12.6 | -- | -- | -- | -- |
| 1542 | Pentwater USA | 7.4 | 5.9 | 10.8 | 9 | -- | -- | -- | -- | -- |
| 1543 | Traverse City USA | 7.4 | 5.3 | 9.2 | 9.2 | 11 | -- | -- | -- | -- |
| 1544 | Northfield USA | 7.4 | 6.4 | 10.9 | 5.9 | 9.9 | -- | -- | -- | -- |
| 1545 | Savage USA | 7.4 | 6.6 | 11.5 | 7.1 | 11.4 | 8.9 | 9.7 | -- | -- |
| 1546 | Arnold USA | 7.4 | 6.6 | 8.2 | 8.2 | 8.4 | 7.7 | 7.3 | 7.6 | 8.6 |
| 1547 | Belgrade USA | 7.4 | 9 | 9.4 | 17.3 | -- | -- | -- | -- | -- |
| 1548 | Crete USA | 7.4 | 6.7 | -- | -- | -- | -- | -- | -- | -- |
| 1549 | Holdrege USA | 7.4 | 6.9 | -- | -- | -- | -- | -- | -- | -- |
| 1550 | Superior USA | 7.4 | 6.6 | 9.6 | -- | -- | -- | -- | -- | -- |
| 1551 | Bordentown USA | 7.4 | 6.9 | 8.9 | -- | -- | -- | -- | -- | -- |
| 1552 | Elizabeth USA | 7.4 | 7.7 | 12 | 9.9 | 10.8 | 9.6 | 10.6 | 10.7 | 10.4 |
| 1553 | Fort Lee USA | 7.4 | 7.2 | 10.1 | 7.1 | 8.9 | -- | 11.4 | -- | -- |
| 1554 | Jersey City USA | 7.4 | 7.3 | 9.6 | 9.6 | 9.7 | -- | 9.5 | 10.8 | 10.5 |
| 1555 | Robbinsville Center USA | 7.4 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1556 | West Orange USA | 7.4 | 6.4 | 11.5 | 9.2 | 11.2 | -- | -- | -- | -- |
