2017-2024
World's most polluted cities
The most polluted cities according to data aggregated from over 80,000 data points.
2024
World Air Quality Report
2024
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
25-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
| Rank | City | 2024 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8951 |  Hiouchi, USA | 1.3 | 0.3 | 0.5 | 0.5 | 1.2 | 1.5 | 1.8 | 1.7 | 1.6 | 1.8 | 1.7 | 0.4 | 0.8 | -- | -- | -- | -- | -- | -- | -- |
| 8952 |  Nieuwoudtville, South Africa | 1.2 | 1.1 | 1.3 | 1.1 | 1 | 1.8 | 2.1 | 0.5 | 0.8 | 1.4 | 1.6 | 0.9 | 0.8 | 2.1 | 3.4 | 3.9 | -- | -- | -- | -- |
| 8953 |  Mayaguez, Puerto Rico | 1.1 | 1 | 0.8 | 1.1 | 0.8 | 1.4 | 0.8 | 0.9 | 0.8 | 1.1 | 1.7 | 1.9 | 2.4 | 1.8 | -- | -- | -- | -- | -- | -- |
| 8954 | Honoka'a, USA | 1 | 1.5 | 1.2 | 0.8 | 0.8 | 0.9 | 1 | 0.9 | 0.8 | 0.9 | 0.9 | 0.9 | 1.6 | 2.4 | 1.6 | -- | -- | -- | -- | -- |
