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2017-2023
World's most polluted cities
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
2023
World Air Quality Report
PM2.5 legend
0-5
Meets WHO guideline
5.1-10
Exceeds by 1 to 2 times
10.1-15
Exceeds by 2 to 3 times
15.1-25
Exceeds by 3 to 5 times
25.1-35
Exceeds by 5 to 7 times
35.1-50
Exceeds by 7 to 10 times
>50.1
Exceeds by over 10 times
Rank | City | 2023 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2901 |  Ban Ko Kaeo, Thailand | 11 | 19.1 | 18.3 | 20.1 | 23.5 | 5.5 | 7 | 7.2 | 5.2 | 5.8 | 4.9 | 6.4 | 9.3 | -- | -- | -- | -- | -- | -- |
| 2902 |  Zahvizdya, Ukraine | 11 | 16.4 | 14.9 | 15 | 10.3 | 8.2 | 6.3 | 6.7 | 8.4 | 9.1 | 8.7 | 12.9 | 17.2 | 20.5 | -- | -- | -- | -- | -- |
| 2903 |  Leeds, USA | 11 | 7.7 | 8.8 | 12 | 8.9 | 10.7 | 14 | 14 | 13 | 14.4 | 8.8 | 10.3 | 9.7 | 9.4 | 10.4 | -- | 11.2 | 9.7 | 9.1 |
| 2904 | Riverbank, USA | 11 | 10.5 | 15.7 | 6.1 | 4.4 | 5.8 | 6.3 | 9.9 | 13 | 12.3 | 12 | 15.3 | 20.8 | 13.7 | 15.3 | -- | -- | -- | -- |
| 2905 | Yorba Linda, USA | 11 | 5.8 | 5.5 | 6.4 | 13.3 | 10.2 | 11.2 | 17.8 | 14.2 | 17.2 | 10.2 | 7.9 | 11.7 | 11.4 | 14.7 | -- | -- | -- | -- |
| 2906 | Atlanta, USA | 11 | 8.2 | 9.2 | 11.7 | 9.3 | 10.4 | 16.3 | 14.3 | 14.8 | 12.6 | 7.9 | 9.8 | 7.9 | 12.1 | 13.3 | 10 | 11.9 | 10.6 | 11.3 |
| 2907 | Dale, USA | 11 | 10.9 | 7.5 | 8.5 | 8.3 | 9.3 | 29.6 | 14.5 | 13.1 | 9.2 | 5.9 | 8.1 | 7.1 | 9 | 11.2 | -- | -- | -- | -- |
| 2908 | Louisville, USA | 11 | 9.2 | 9.4 | 9.2 | 9.1 | 8.9 | 22.9 | 14.4 | 14.1 | 9.9 | 7.3 | 10 | 8.1 | 9 | 10.3 | 9.1 | 9.7 | 9.4 | 8.8 |
| 2909 | Westlake, USA | 11 | 7.5 | 9.6 | 13.1 | 8.3 | 15.3 | 12.3 | 11 | 13.2 | 11.3 | 8.2 | 9.9 | 12.1 | 10.4 | 10.7 | 10.6 | 10.7 | 11.3 | 11.1 |
| 2910 | Mechanicsville, USA | 11 | 9.9 | 10.2 | 8.5 | 9.1 | 9.7 | 25.9 | 16.1 | 12.5 | 9.1 | 6.2 | 8 | 8.1 | 10.2 | 11.7 | -- | -- | -- | -- |
| 2911 | Towson, USA | 11 | 10.8 | 11 | 8.5 | 8.5 | 9.3 | 25.8 | 17.2 | 12 | 9.1 | 5.6 | 8 | 8.7 | 10.8 | 11 | -- | -- | -- | -- |
| 2912 | Allen Park, USA | 11 | 11.1 | 8.7 | 9.1 | 9.6 | 8.9 | 30.8 | 12.4 | 10.7 | 7.9 | 6.3 | 8.3 | 8.6 | 8.8 | 10.9 | 8.7 | 8.4 | 9.1 | 8.8 |
| 2913 | Hudsonville, USA | 11 | 11.1 | 8.1 | 8.2 | 8.8 | 8.7 | 30.3 | 14.2 | 12 | 8.7 | 6 | 7.7 | 8.8 | 9 | 9.9 | -- | -- | -- | -- |
| 2914 | Blaine, USA | 11 | 11.6 | 7.8 | 6.6 | 5.4 | 9.2 | 19.7 | 14 | 16.8 | 13.2 | 6.7 | 7.7 | 12.4 | 6.9 | 9.5 | 8.1 | 8.8 | 8.3 | 8 |
| 2915 | Park Rapids, USA | 11 | 15.3 | 7.4 | 6.4 | 5.3 | 8.7 | 22.2 | 16 | 17.3 | 14.9 | 4.7 | 5.6 | 7.4 | 6.6 | 14.8 | -- | -- | -- | -- |
| 2916 | Prior Lake, USA | 11 | 18.5 | -- | 8.8 | 6.9 | 10.3 | 20.4 | 11.2 | 13.5 | 10.4 | 5 | 4.3 | 7.3 | 7.9 | 12.4 | -- | -- | -- | -- |
| 2917 | Cleveland, USA | 11 | 7.3 | 8.7 | 9.6 | 9.2 | 14.8 | 14.7 | 12.3 | 14 | 13.6 | 12 | 9.5 | 7.5 | 8.5 | 8.2 | 8.6 | 9.1 | 8.9 | -- |
| 2918 | Raleigh, USA | 11 | 9.4 | 9.4 | 8.7 | 8.2 | 9.7 | 21.8 | 16.3 | 14.1 | 10.7 | 7.2 | 9.5 | 7.6 | 10.4 | 12.2 | 9.8 | 11.3 | 9.8 | 9.4 |
| 2919 | Whitakers, USA | 11 | 8.3 | 8.9 | 7.9 | 8.5 | 9.4 | 22.1 | 17.5 | 16 | -- | -- | 7.8 | 6.5 | 9.8 | -- | -- | -- | -- | -- |
| 2920 | Dayton, USA | 11 | 10.1 | 9.7 | 9 | 9.1 | 8.5 | 26.8 | 13.7 | 12.1 | 7.7 | 6.7 | 9.5 | 8.9 | 9.6 | 10.6 | 10.4 | 9 | 8.2 | 7.1 |
| 2921 | Tulsa, USA | 11 | 12.2 | 9.5 | 10.7 | 10.8 | 15.3 | 14.1 | 10.6 | 13.7 | 14.6 | 6.6 | 7.7 | 6.7 | 10.3 | 11.9 | 9.7 | 11.6 | 11.6 | 10.3 |
| 2922 | Diamond Lake, USA | 11 | 9.4 | 9.9 | 7.6 | 6.8 | 8.4 | 7.2 | 11.4 | 38.4 | 10 | 6.4 | 9.3 | 8.6 | 11.4 | -- | -- | -- | -- | -- |
| 2923 | Finleyville, USA | 11 | 12 | 11 | 8.9 | 8 | 10.2 | 25 | 14.9 | 13.6 | 9.3 | 5.3 | 7.8 | 6.6 | -- | -- | -- | -- | -- | -- |
| 2924 | Pittsburgh, USA | 11 | 11.2 | 9.1 | 7.3 | 7.6 | 9.7 | 25.1 | 16.4 | 14.3 | 9.1 | 5.8 | 8.6 | 7.8 | 9.8 | 12.5 | 10.1 | 12.2 | 10.1 | 10 |
| 2925 | Round Rock, USA | 11 | 12.3 | 12.7 | 14 | 11.2 | 17.5 | 17.9 | 8.6 | 9.9 | 11.9 | 4.8 | 7.6 | 5.5 | 10.6 | 11.1 | -- | -- | -- | -- |
| 2926 | Leesburg, USA | 11 | 8.4 | 12.1 | 7.3 | 7.4 | 10 | 26.4 | 15.1 | 14 | 8.6 | 6 | 8.5 | 9.6 | 9.2 | 11.4 | -- | -- | -- | -- |
| 2927 | Richmond, USA | 11 | 9 | 8.9 | 8.3 | 8.2 | 9.4 | 23 | 16.1 | 13.1 | 9.5 | 7.1 | 9.5 | 9.3 | 10.3 | 11.9 | 8.8 | 11.4 | 7.2 | 7.2 |
| 2928 | Black River Falls, USA | 11 | 12.5 | 10.6 | 8.1 | 7.2 | 8.8 | 25.2 | 12.4 | 15.1 | 10.7 | 5.5 | 4.6 | 9.1 | 8.4 | 11.7 | -- | -- | -- | -- |
| 2929 | Green Bay, USA | 11 | 9.8 | 8.9 | 8.8 | 8 | 8 | 32 | 13.6 | 11.5 | 9.8 | 5.1 | 6.8 | 9.2 | 7.4 | 8.5 | 7.4 | 7.8 | 6.5 | 6.1 |
| 2930 |  Genk, Belgium | 10.9 | 12.5 | 18.5 | 9.8 | 12 | 13.9 | 11.9 | 6.8 | 7.9 | 9.2 | 9.4 | 9.1 | 10.8 | 11.8 | 13.9 | 11.6 | -- | -- | -- |
| 2931 | Zwevegem, Belgium | 10.9 | 12.3 | 18.1 | 9.2 | 14.4 | 14 | 12.7 | 6.8 | 7.3 | 9.8 | 8.1 | 8.5 | 10.9 | 12.2 | 14 | 11.7 | 13.3 | 15.4 | 13.9 |
| 2932 |  Fernie, Canada | 10.9 | 8.2 | 4.9 | 10 | 6.1 | 16 | 10 | 16.1 | 23.8 | 12.4 | 8.4 | 9.3 | 6.3 | 18.5 | -- | -- | -- | -- | -- |
| 2933 | Rossland, Canada | 10.9 | 9.3 | 5.7 | 4.8 | 4.9 | 7.4 | 7.8 | 9.4 | 43 | 6.8 | 7 | 9.5 | 13.4 | 8.8 | 27.8 | -- | -- | -- | -- |
| 2934 | Mississauga, Canada | 10.9 | 10.3 | 8.9 | 7.6 | 9.2 | 7.5 | 25.6 | 14.8 | 13.3 | 9.8 | 7 | 7.7 | 9.5 | 8.3 | 9.7 | 6.9 | 6.9 | 7.4 | 7.2 |
| 2935 | Oakville, Canada | 10.9 | 8.7 | 7.3 | 6.8 | 8.5 | 8 | 28.4 | 15.1 | 14 | 10.6 | 7.2 | 7.9 | 8.8 | 6.8 | 7.2 | 6.3 | 6.9 | 7.5 | 7.3 |
| 2936 | Sainte-Anne-de-Bellevue, Canada | 10.9 | 8.5 | 12.2 | 8.5 | 8.4 | 8.8 | 22.1 | 13.8 | 8.7 | 12 | 7.9 | 7.3 | 12.5 | 7.1 | 9.2 | 8.5 | 8.2 | 6.3 | 6.3 |
| 2937 |  Lille, France | 10.9 | 16.9 | 21.8 | 6.5 | 12.8 | 12.9 | 14.1 | 5.9 | 6.7 | 14.6 | 8.7 | 8.4 | 9.3 | 9.8 | 11.9 | 10.1 | 11.8 | 14.3 | 14.2 |
| 2938 | Marignane, France | 10.9 | 15.5 | 21.4 | 13.1 | 5.5 | 7.4 | 9.3 | 8.9 | 8.7 | 9.1 | 9.1 | 8.9 | 14.3 | 13.6 | 12.4 | 12 | -- | -- | -- |
| 2939 |  Ingolstadt, Germany | 10.9 | 16.7 | 17.6 | 10.9 | 8.6 | 9.3 | 10.8 | 8.5 | 8.1 | 10.9 | 12.5 | 6.6 | 12 | 10.2 | 10.2 | 10.6 | 10.8 | 13.9 | 13.6 |
| 2940 |  Veszprém, Hungary | 10.9 | 12.7 | 16 | 11.8 | 9.8 | 9.9 | 9.9 | 10.5 | 10.8 | 10.5 | 9 | 8.8 | 12.7 | 13.4 | 12.5 | 12.6 | -- | -- | -- |
| 2941 | Kecskemét, Hungary | 10.9 | 10.4 | 15.8 | 7.9 | 10.8 | 10.2 | 10.2 | 8.8 | 16.6 | 9.7 | 8.4 | 9.4 | 17.4 | -- | -- | -- | -- | -- | -- |
| 2942 |  Salerno, Italy | 10.9 | 13.6 | 12.8 | 9.1 | 8.1 | 8.7 | 9.9 | 13 | 12.4 | 14.2 | 12.7 | 7.7 | 13.2 | 11.4 | 9.6 | -- | -- | -- | -- |
| 2943 | Madonna dell'Acqua, Italy | 10.9 | -- | -- | -- | 7.6 | 7.6 | 8.7 | 9.9 | 9.3 | 11.1 | 9.6 | 11.4 | 20.2 | -- | -- | -- | -- | -- | -- |
| 2944 |  Ogori, Japan | 10.9 | 14.9 | 12.7 | 13.5 | 12.6 | 12 | 11 | 8.2 | 7 | 8 | 9.4 | 11.2 | 11.5 | 13 | 12.7 | -- | -- | -- | -- |
| 2945 | Oki, Japan | 10.9 | 15.1 | 12.5 | 13.4 | 12.6 | 12 | 11 | 8.3 | 7 | 8 | 9.4 | 11.4 | 10.8 | 12.8 | 12.9 | 13.1 | -- | -- | -- |
| 2946 | Tagawa, Japan | 10.9 | 12 | 11.1 | 13.8 | 13.4 | 12.4 | 11.6 | 9 | 7.5 | 7.7 | 9 | 11.9 | 11.8 | 12.4 | 11.4 | 12.6 | 13.8 | 13.8 | 15 |
| 2947 | Utazu, Japan | 10.9 | 11.3 | 10.1 | 13.1 | 13.4 | 10.9 | 13.4 | 11.8 | 7.9 | 9.7 | 9 | 10 | 10.5 | 10.9 | -- | -- | -- | -- | -- |
| 2948 | Esebicho, Japan | 10.9 | 11.6 | 11 | 12.5 | 13.9 | 9.5 | 11.6 | 10.7 | 7.2 | 8.5 | 10.2 | 26.8 | -- | -- | -- | -- | -- | -- | -- |
| 2949 | Fukaisawamachi, Japan | 10.9 | 10.4 | 10.3 | 12.7 | 13.9 | 10 | 12.3 | 11.6 | 8.4 | 9.3 | 9.8 | 10.9 | 10.6 | -- | -- | -- | -- | -- | -- |
| 2950 | Osaka, Japan | 10.9 | 11.7 | 11.9 | 13.8 | 14.6 | 10.4 | 11.4 | 10.3 | 6.7 | 7.5 | 9 | 11.9 | 12.1 | 10.2 | 10 | 10.7 | 13.5 | 13.8 | 14.9 |
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