2017-2023
2023
World Air Quality Report
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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
233 | Hanoi, Vietnam | 43.7 | 73.8 | 46.1 | 54.4 | 47.3 | 33.8 | 27 | 22 | 28.2 | 30.8 | 40.7 | 58.6 | 61.3 | 40.1 | 36.2 | 37.9 | 46.9 | 40.8 | 45.8 |
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