World's most polluted cities 2020 (PM2.5)

The most polluted cities according to data aggregated from over 80,000 data points.

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Hanoi, Vietnam x

2020

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World air quality report

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2020 World air quality report

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PM2.5 Legend grey informational icon
WHO target
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
Unit: µg/m³
Rank City 2020 AVG JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2019 AVG 2018 AVG 2017 AVG
232 Vietnam
Hanoi, Vietnam
37.9 49.8 62.8 45.4 43.4 34.5 27.5 23.9 23.3 27.9 27.4 39.7 50.5 46.9 40.8 45.8

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