2017-2022

World's most polluted cities

Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)

2022

World Air Quality Report

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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
2022 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2021 2020 2019 2018 2017
1 Nepal
Kathmandu, Nepal
40.7 61.2 51.6 61.9 63.7 36.9 34.5 17.5 15.1 19.3 23.5 44.5 60.4 50.9 39.2 48 54.4 45.9
2 Nepal
Bhaktapur, Nepal
39.1 -- -- -- -- 43.3 42.6 22.4 18.7 27.8 34.3 61.1 66 30.7 -- -- -- --
3 Nepal
Kirtipur, Nepal
32.9 57 39.2 46.8 49.5 29.3 25.8 17 15.6 21.8 26.2 46.7 54.1 31.1 -- 20 -- --

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