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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1707 |  Salina USA | 7.2 | 7.9 | 10.9 | 9.1 | 12.7 | -- | -- | -- | -- |
| 1708 | Marrero USA | 7.2 | 5.9 | 9.1 | 9.2 | 10 | 9.1 | 10.1 | -- | -- |
| 1709 | Mount Airy USA | 7.2 | 6.9 | 11.2 | 9 | 11.1 | 9.7 | 11.9 | -- | -- |
| 1710 | Gloucester USA | 7.2 | 9.5 | 14.2 | 5.7 | 9.5 | 5.9 | 7.2 | -- | -- |
| 1711 | Melrose USA | 7.2 | 6.6 | 6.2 | -- | -- | -- | -- | -- | -- |
| 1712 | Flint USA | 7.2 | 7 | 8.7 | 8.1 | 7.5 | 6.5 | 7.9 | 8 | 7.4 |
| 1713 | Hermansville USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1714 | Watersmeet USA | 7.2 | 5.7 | -- | -- | -- | -- | -- | -- | -- |
| 1715 | Sandstone USA | 7.2 | 5.6 | 11 | -- | -- | -- | -- | -- | -- |
| 1716 | Grand Island USA | 7.2 | 6.8 | 7.7 | 5.8 | 7.7 | -- | -- | -- | -- |
| 1717 | Santee USA | 7.2 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 1718 | Bradford USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1719 | Franklin Park USA | 7.2 | 7.1 | 9.8 | -- | -- | -- | -- | -- | -- |
| 1720 | Matawan USA | 7.2 | 6.3 | 11.3 | 9.4 | -- | -- | -- | -- | -- |
| 1721 | Point Pleasant Beach USA | 7.2 | 6.9 | 11.1 | -- | -- | -- | -- | -- | -- |
| 1722 | Titusville USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1723 | New Hartford USA | 7.2 | 6.7 | 8.8 | -- | -- | -- | -- | -- | -- |
| 1724 | Preston-Potter Hollow USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1725 | Rochester USA | 7.2 | 6.7 | 11.4 | 8.4 | 7.5 | 6.6 | 6.6 | 6.3 | 6.7 |
| 1726 | University at Buffalo USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1727 | Whitesboro USA | 7.2 | 6.3 | 7.6 | 5 | 9.3 | 9.3 | 9.7 | -- | -- |
| 1728 | Rural Hall USA | 7.2 | 7.5 | 8.9 | -- | -- | -- | -- | -- | -- |
| 1729 | Bismarck USA | 7.2 | 7 | 10.4 | 7.4 | 10 | 5.8 | 4.9 | 7.1 | -- |
| 1730 | Broadview Heights USA | 7.2 | 7.1 | 12.2 | 12.1 | 13.4 | -- | -- | -- | -- |
| 1731 | McConnelsville USA | 7.2 | 7.1 | 7.5 | -- | -- | -- | -- | -- | -- |
| 1732 | New Albany USA | 7.2 | 5.8 | 7.2 | 6.2 | 7.8 | 7 | 7.9 | 7.9 | 7 |
| 1733 | Waterville USA | 7.2 | 4.3 | 9 | -- | -- | -- | -- | -- | -- |
| 1734 | Edmond USA | 7.2 | 8.1 | 9.5 | 9.3 | 10.8 | 10 | 9.7 | 9.6 | 8.9 |
| 1735 | Umatilla USA | 7.2 | 6.7 | 10.2 | -- | -- | -- | -- | -- | -- |
| 1736 | Warm Springs USA | 7.2 | 6.5 | 10.9 | 4.4 | -- | -- | -- | -- | -- |
| 1737 | New Hope USA | 7.2 | 6.7 | 10.9 | -- | -- | -- | -- | -- | -- |
| 1738 | Pen Argyl USA | 7.2 | 6.8 | -- | -- | -- | -- | -- | -- | -- |
| 1739 | Plymouth Meeting USA | 7.2 | 7 | 10.1 | 7.8 | 9.5 | 7.5 | 7.8 | 7.8 | 8.8 |
| 1740 | Springdale USA | 7.2 | 6.5 | 9.8 | 6.6 | 12.4 | -- | -- | -- | -- |
| 1741 | Union USA | 7.2 | 7.8 | 8.8 | -- | -- | -- | -- | -- | -- |
| 1742 | Timber Lake USA | 7.2 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 1743 | Kingsport USA | 7.2 | 7.1 | 9 | 5.1 | 9.7 | 6.1 | 7.5 | 7.2 | 7.7 |
| 1744 | Anderson USA | 7.2 | 7.6 | 10.7 | -- | -- | -- | -- | -- | -- |
| 1745 | Lockhart USA | 7.2 | 7.7 | 4.1 | 13.1 | 12.9 | -- | -- | -- | -- |
| 1746 | Quinlan USA | 7.2 | 7.8 | -- | -- | -- | -- | -- | -- | -- |
| 1747 | Bellwood USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1748 | Charles City USA | 7.2 | 6.9 | 9.4 | 7.1 | -- | -- | -- | -- | -- |
| 1749 | Grundy USA | 7.2 | 8.1 | 12 | 12 | 11.6 | -- | -- | -- | -- |
| 1750 | Leesburg USA | 7.2 | 7 | 11 | 9.2 | 11.4 | -- | -- | -- | -- |
| 1751 | Montrose USA | 7.2 | 7.2 | -- | -- | -- | -- | -- | -- | -- |
| 1752 | Oakton USA | 7.2 | 7.1 | 10.2 | 17 | 12.6 | -- | -- | -- | -- |
| 1753 | Purcellville USA | 7.2 | 7 | 10.3 | 9 | 10.6 | 9.5 | 11 | -- | -- |
| 1754 | Yorktown USA | 7.2 | -- | -- | -- | -- | -- | -- | -- | -- |
| 1755 | Almira USA | 7.2 | 6.6 | -- | -- | -- | -- | -- | -- | -- |
| 1756 | Manson USA | 7.2 | 8 | 6.8 | 10.8 | 15.1 | -- | -- | -- | -- |
