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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1231 |  Kaohsiung, Taiwan | 19.4 | 30.3 | 30.3 | 27.7 | 24.2 | 17.3 | 8 | 7.1 | 8.9 | 10.4 | 19.2 | 24 | 26.4 | 19.4 | 21.6 | 19.8 | 22.7 | 24.4 | 27.7 |
| 3299 |  Paris, France | 10.3 | 11.3 | 17.8 | 10.4 | 10.4 | 11 | 12.9 | 7.2 | 6.7 | 9.5 | 9.8 | 7.5 | 9.8 | 12.7 | 13.7 | 12.2 | 14.7 | 15.6 | 15.4 |
| 6386 |  Vancouver BC, Canada | 6.2 | 4.5 | 4.5 | 5.1 | 3.3 | 7.8 | 5.4 | 5.2 | 12.5 | 9.2 | 6 | 5.5 | 4 | 7.6 | -- | -- | -- | -- | -- |
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