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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Orzesze, Poland | 20.2 | 36.4 | 35 | 26.3 | 20.9 | 8.1 | 6.9 | 5.4 | 7 | 12.5 | 17.8 | 24.7 | 34.1 | 32.1 | 38.2 | 44.1 | -- | -- | -- |
| 2 | Raciborz, Poland | 19.3 | 25 | 28.5 | 23.8 | 23.7 | 15.1 | 12.1 | 9.6 | 10.4 | 14.5 | 17.9 | 18.2 | 33.7 | 22.1 | 27.4 | 24.9 | 24.5 | -- | -- |
| 3 | Jastrzebie Zdroj, Poland | 18.6 | -- | -- | 14.6 | 27.2 | 18.6 | 14.6 | 11.2 | 12.2 | 17.1 | 17.9 | 19.1 | 31 | -- | -- | -- | -- | -- | -- |
| 4 | Bielsko-Biala, Poland | 17.2 | 21 | 29.2 | 21.7 | 20.2 | 15.4 | 12.3 | 10.5 | 10.3 | 12.8 | 12.9 | 13.6 | 27 | 21.4 | 26.4 | 24.7 | 27 | -- | -- |
| 5 | Katowice, Poland | 16.2 | 19.5 | 23.5 | 20.8 | 17.4 | 11.6 | 11.5 | 10.9 | 12.1 | 15 | 14.5 | 14.5 | 23.8 | 25.9 | 22.5 | 21.4 | 26 | 30.4 | 25.1 |
| 6 | Zawiercie, Poland | 15.2 | 19.1 | 27.4 | 19.3 | 16.5 | 14.8 | 12.3 | 10.7 | 11.2 | 13.8 | 13.6 | 12.5 | 23.9 | 17.6 | 17.7 | -- | -- | -- | -- |
| 7 | Goczalkowice Zdroj, Poland | 15.1 | 12.9 | 17.6 | 20.2 | 21 | 13.2 | 11.1 | 9 | 9.7 | 12.2 | 12.7 | 13.7 | 30 | 22.2 | 31.9 | 31.6 | 29.6 | -- | -- |
| 8 | Sosnowiec, Poland | 14.7 | 16.8 | 20.9 | 17.2 | 15.2 | 12.5 | 12.6 | 10.7 | 11.6 | 13.5 | 13.5 | 12.6 | 26.8 | 16.7 | 19.9 | 17.3 | -- | -- | -- |
| 9 | Rybnik, Poland | 13.6 | 16.1 | 21.1 | 17.5 | 15.9 | 11.6 | 10.7 | 8.8 | 10 | 13.4 | 11.8 | 10.2 | 24.5 | 16.3 | 20.9 | 18.7 | -- | -- | -- |
| 10 | Ponik, Poland | 13.4 | 17.6 | 18.4 | 17.4 | 16 | 11 | 10.2 | 8.6 | 8.6 | 10.6 | 11.4 | 12.4 | 18.9 | 15 | 17.8 | 15.2 | 12.8 | 17.7 | 17.2 |
| 11 | Lubliniec, Poland | 11.7 | 16 | 15.9 | 15.4 | 14.4 | 11.5 | 9.3 | 7.5 | 8 | 10.2 | 10.7 | 8.2 | 18.9 | 14.3 | 18.1 | 18.9 | -- | -- | -- |
| 12 | Ustron, Poland | 7.9 | 10.3 | 12.1 | 9.6 | 10.2 | 8.1 | 7.4 | 6.4 | 5.8 | 6.4 | 5.1 | 4.8 | 11.4 | 9.7 | 10.4 | 8.8 | -- | -- | -- |
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