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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2918 |  West End Canada | 5.6 | 7.1 | -- | -- | -- | -- | -- | -- | -- |
| 2919 |  Casas Adobes USA | 5.6 | 5.4 | 7 | 3.9 | 5.3 | -- | -- | -- | -- |
| 2920 | Roland USA | 5.6 | 5.1 | 8.8 | 6.9 | 12.3 | 9.1 | -- | -- | -- |
| 2921 | Arnold USA | 5.6 | 5.9 | 7.4 | 7.5 | 12.4 | 17.8 | 7.5 | -- | -- |
| 2922 | Castroville USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2923 | Coalinga USA | 5.6 | 6.5 | 7.1 | 8.8 | 13.1 | -- | -- | -- | -- |
| 2924 | East Palo Alto USA | 5.6 | 5.3 | 6.8 | 9.3 | 9 | -- | -- | -- | -- |
| 2925 | Escondido USA | 5.6 | 6.2 | 7.8 | 7.4 | 10.3 | -- | -- | -- | -- |
| 2926 | Kelly Ridge USA | 5.6 | 3.9 | -- | -- | -- | -- | -- | -- | -- |
| 2927 | Kern USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2929 | Markleeville USA | 5.6 | 5 | 6.6 | 5.5 | 4 | 12.3 | 5.3 | -- | -- |
| 2930 | Martinez USA | 5.6 | 5.3 | 6.3 | 7.5 | 9 | -- | 5.1 | 6.2 | -- |
| 2931 | Oak View USA | 5.6 | 5.7 | 6 | 5.9 | 8.8 | 9.9 | 7.9 | -- | -- |
| 2932 | Ojai USA | 5.6 | 5.4 | 5.3 | 6.2 | 8.4 | 8.2 | 6 | 10.4 | 12.7 |
| 2933 | Palmdale USA | 5.6 | 5.8 | 5.7 | 4 | 6.2 | 9.4 | 5.5 | -- | -- |
| 2934 | Pittsburg USA | 5.6 | 5.4 | 6.7 | 7.4 | 9.9 | -- | -- | -- | -- |
| 2935 | Pollock Pines USA | 5.6 | 4.7 | 6 | 7.1 | 26 | 14.7 | 7.8 | -- | -- |
| 2936 | Rocklin USA | 5.6 | 5.3 | 6.8 | 8.7 | 13.1 | 16.5 | 6.6 | -- | -- |
| 2937 | Rough and Ready USA | 5.6 | 6 | 8.1 | -- | -- | -- | -- | -- | -- |
| 2938 | Vine Hill USA | 5.6 | 5.4 | 3 | -- | -- | -- | -- | -- | -- |
| 2939 | West Sacramento USA | 5.6 | 5.3 | 7.6 | 9.7 | 12.4 | -- | 7.5 | -- | -- |
| 2940 | Wilkerson USA | 5.6 | 4.7 | -- | -- | -- | -- | -- | -- | -- |
| 2941 | Winters USA | 5.6 | 5.3 | 6.2 | 6.4 | 10.7 | 17.6 | 7.4 | -- | -- |
| 2942 | Aurora USA | 5.6 | 5.6 | 5.7 | 4.1 | 9.7 | -- | 7.1 | -- | -- |
| 2943 | Douglas USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2944 | Fairmount USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2945 | Fort Collins USA | 5.6 | 5.8 | 6.2 | 5.4 | 9.8 | 10.2 | 7.9 | 7.8 | 7.5 |
| 2946 | Nederland USA | 5.6 | 5.5 | 4.6 | 2.8 | 9.6 | -- | -- | -- | -- |
| 2947 | Pueblo County USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2948 | Torrington USA | 5.6 | 5.1 | 8.5 | -- | -- | -- | -- | -- | -- |
| 2949 | Avon Park USA | 5.6 | 5.6 | 6 | -- | -- | -- | -- | -- | -- |
| 2950 | St. Jacob USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2951 | Grayson USA | 5.6 | 5.3 | 7.6 | 6.8 | -- | -- | -- | -- | -- |
| 2952 | Auburn USA | 5.6 | 5.6 | -- | -- | -- | -- | -- | -- | -- |
| 2953 | Raymond USA | 5.6 | 4.9 | 6.4 | -- | -- | -- | -- | -- | -- |
| 2954 | Cambridge USA | 5.6 | 5.3 | 7.1 | 6.7 | 7.6 | 7.4 | 8.1 | -- | -- |
| 2955 | Carlisle USA | 5.6 | 5.1 | 7.7 | 6.3 | 8.4 | -- | -- | -- | -- |
| 2956 | Sidney USA | 5.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 2957 | Las Vegas USA | 5.6 | 6.3 | 4.9 | 4 | 5.8 | 7.2 | 6 | 7.2 | 7.5 |
| 2958 | Brookline USA | 5.6 | 5.2 | 8 | -- | -- | -- | -- | -- | -- |
| 2959 | Lebanon USA | 5.6 | 5.3 | 9.5 | 6.8 | 9.3 | 8.5 | 9.8 | -- | -- |
| 2960 | North Beach Haven USA | 5.6 | 5.5 | 8.4 | 1.4 | -- | -- | -- | -- | -- |
| 2961 | Glen Cove USA | 5.6 | 5 | 9.7 | 9.2 | 10.3 | -- | -- | -- | -- |
| 2962 | Naples USA | 5.6 | 5 | 9 | 6.5 | 8.8 | 7.2 | 7.8 | -- | -- |
| 2963 | Bryson City USA | 5.6 | 6.1 | 7.9 | 5.3 | 9.3 | 6 | 8.6 | 7.8 | 8.1 |
| 2964 | Ogden USA | 5.6 | 5.8 | 9.6 | 7.8 | 9.6 | 8.4 | -- | -- | -- |
| 2965 | Waynesville USA | 5.6 | 5.8 | 8.3 | 7.2 | 11.5 | -- | -- | -- | -- |
| 2966 | Chiloquin USA | 5.6 | 4.7 | 8.5 | 7.7 | -- | -- | -- | -- | -- |
| 2967 | Oak Hills USA | 5.6 | 5.2 | 6.5 | 12.9 | -- | -- | -- | -- | -- |
| 2968 | Redmond USA | 5.6 | 7.4 | 10.1 | 5.9 | 9.5 | 16.7 | 7.3 | -- | -- |
