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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Baghdad Iraq | 44.3 | 40.5 | 45.8 | 86.7 | 49.7 | -- | 39.6 | -- | -- |
| 2 | Seyid Sadiq Iraq | 34.7 | 24.6 | -- | -- | -- | -- | -- | -- | -- |
| 3 | Derbendixan Iraq | 32.8 | 27.7 | -- | -- | -- | -- | -- | -- | -- |
| 4 | Kirkuk Iraq | 29.4 | 19.8 | -- | -- | -- | -- | -- | -- | -- |
| 5 | Kelar Iraq | 27.7 | 21.9 | -- | -- | -- | -- | -- | -- | -- |
| 6 | Dukan Iraq | 25 | 18.7 | -- | -- | -- | -- | -- | -- | -- |
| 7 | Halabjah Iraq | 24.5 | 18.5 | -- | -- | -- | -- | -- | -- | -- |
| 8 | Chwarta Iraq | 23.8 | 15.1 | -- | -- | -- | -- | -- | -- | -- |
| 9 | Erbil Iraq | 23.3 | 22.8 | 30.4 | 35 | -- | -- | -- | -- | -- |
| 10 | As Sulaymaniyah Iraq | 21.5 | 16.7 | 23.6 | -- | -- | -- | -- | -- | -- |
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