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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2766 |  Regional District of Central Kootenay Canada | 5.8 | 6.2 | 12.1 | 2 | 25.5 | -- | -- | -- | -- |
| 2767 | North Bay Canada | 5.8 | 4.7 | 8 | 5.2 | 5.7 | 4.7 | 4.6 | 5.6 | 4.7 |
| 2768 | Rouyn-Noranda Canada | 5.8 | 4.6 | 9 | 5.9 | 6.8 | -- | -- | -- | -- |
| 2769 | Tingwick Canada | 5.8 | 5.5 | 7.3 | 5.9 | 6.9 | -- | -- | -- | -- |
| 2770 |  La Paz Mexico | 5.8 | 6.5 | 6.6 | 5.6 | 6.1 | -- | -- | -- | -- |
| 2771 |  Chaguanas Trinidad and Tobago | 5.8 | 7.2 | 6.7 | 5.8 | 6.7 | -- | -- | -- | -- |
| 2772 |  Tok USA | 5.8 | 5.9 | 7.7 | 8.3 | 9.1 | -- | -- | -- | -- |
| 2773 | Fort Smith USA | 5.8 | 6.4 | 10.2 | 8.5 | -- | -- | -- | -- | -- |
| 2774 | Camino Tassajara USA | 5.8 | 4 | -- | -- | -- | -- | -- | -- | -- |
| 2775 | Colfax USA | 5.8 | 4.7 | 6 | 8.8 | 11.7 | 13.5 | 6.1 | 11.3 | 6.6 |
| 2776 | Contra Costa Centre USA | 5.8 | 6.4 | 8.2 | 9.1 | 10.2 | -- | -- | -- | -- |
| 2777 | Del Mar USA | 5.8 | 5.9 | 7.3 | 7.5 | 10.9 | 11.9 | 9.6 | -- | -- |
| 2778 | East Foothills USA | 5.8 | 5.2 | -- | -- | -- | -- | -- | -- | -- |
| 2779 | Milpitas USA | 5.8 | 5.6 | 7.2 | 9.3 | 9.5 | 13.8 | 7.3 | 14.5 | -- |
| 2780 | San Miguel USA | 5.8 | 5.3 | 7 | 6.6 | 8.8 | -- | -- | -- | -- |
| 2781 | Shasta Lake USA | 5.8 | 5.6 | 6.7 | 6.6 | 19.6 | 15.5 | 7.6 | -- | -- |
| 2783 | Cedaredge USA | 5.8 | 4.6 | 2.6 | 1.7 | 7.7 | -- | 3 | -- | -- |
| 2784 | Fruitvale USA | 5.8 | 5 | 3.6 | 3.5 | 10.3 | -- | 4.3 | -- | -- |
| 2785 | Golden USA | 5.8 | 5.7 | 5.2 | 3.7 | 10.3 | -- | -- | -- | -- |
| 2786 | Grand Junction USA | 5.8 | 5.4 | 3.7 | 4.2 | 7.6 | 6.9 | 4.2 | 5.9 | 5.5 |
| 2787 | Idaho Springs USA | 5.8 | 3.7 | -- | -- | -- | -- | -- | -- | -- |
| 2788 | Loveland USA | 5.8 | 6.1 | 7 | 6 | 11.2 | -- | -- | -- | -- |
| 2789 | Orchard Mesa USA | 5.8 | 5.4 | 3.6 | 4.5 | 5.5 | -- | -- | -- | -- |
| 2790 | Pueblo West USA | 5.8 | 6.4 | -- | -- | -- | -- | -- | -- | -- |
| 2791 | Alachua USA | 5.8 | 6.1 | -- | -- | -- | -- | -- | -- | -- |
| 2792 | Coconut Creek USA | 5.8 | 7.1 | 9.5 | 8.3 | -- | -- | -- | -- | -- |
| 2793 | Newark USA | 5.8 | 8.2 | 13 | 11.6 | 12.4 | -- | -- | -- | -- |
| 2794 | Gorham USA | 5.8 | 5.6 | 9.5 | 2.4 | 5.2 | 8 | 7.9 | -- | -- |
| 2795 | Chicopee city USA | 5.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2796 | Heath USA | 5.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2797 | Holden USA | 5.8 | 4.7 | 7 | 5.6 | 8.1 | -- | -- | -- | -- |
| 2798 | Hopkinton USA | 5.8 | 5.5 | -- | -- | -- | -- | -- | -- | -- |
| 2799 | Littleton USA | 5.8 | 5.3 | -- | -- | -- | -- | -- | -- | -- |
| 2800 | Salem USA | 5.8 | 5.2 | 8.1 | 5 | -- | -- | -- | -- | -- |
| 2801 | Uxbridge USA | 5.8 | 6.2 | 8.1 | 4.5 | -- | -- | -- | -- | -- |
| 2802 | Harbor Springs USA | 5.8 | 3.6 | 9.6 | 5.4 | -- | -- | -- | -- | -- |
| 2803 | Oak Grove USA | 5.8 | 6.2 | 7.3 | -- | -- | -- | -- | -- | -- |
| 2804 | Missoula USA | 5.8 | 7.6 | 7.1 | 8.9 | 11.9 | 8.7 | 7.4 | 8.2 | 12.6 |
| 2805 | Elwood USA | 5.8 | 6.3 | -- | -- | -- | -- | -- | -- | -- |
| 2806 | Franconia USA | 5.8 | 5.4 | 7.1 | 5.4 | 7.4 | 6.5 | 6.7 | -- | -- |
| 2807 | Lincoln USA | 5.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2808 | Morris USA | 5.8 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2809 | Upper Montclair USA | 5.8 | 7 | -- | -- | -- | -- | -- | -- | -- |
| 2810 | South Valley USA | 5.8 | 6.6 | 5.9 | 7 | -- | -- | -- | -- | -- |
| 2811 | Nassau USA | 5.8 | 5.7 | 7.7 | 8.1 | 10.5 | -- | -- | -- | -- |
| 2812 | Pomona USA | 5.8 | 5 | 6.6 | 5.4 | 6 | 5.4 | 5.9 | 6 | 5.8 |
| 2813 | Poughkeepsie USA | 5.8 | 5.8 | 6.7 | 5.4 | 9.2 | 6.8 | 6.9 | -- | -- |
| 2814 | Whitehall USA | 5.8 | 5.4 | 8.8 | -- | -- | -- | -- | -- | -- |
| 2815 | Highlands USA | 5.8 | 6.1 | 8.6 | 7.2 | 9.4 | 6.6 | 9.2 | -- | -- |
| 2816 | Bend USA | 5.8 | 9.3 | 10.7 | 7.4 | 11.3 | 13.6 | 5.8 | 8.4 | 10 |
