Live rankingHistorical rankings

2017-2025

World's most polluted cities

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

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2025

World Air Quality Report

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2025

World Air Quality Report

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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
25.1-35Exceeds by 5 to 7 times
35.1-50Exceeds by 7 to 10 times
>50.1Exceeds by over 10 times
RankCity202520242023202220212020201920182017
4387
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Haines

USA

1.6
1.5
2.8
2.9
5
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4388
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Ainaloa

USA

1.6
1.6
1.7
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4389
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Hiouchi

USA

1.5
1.3
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4390
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Dexter

USA

1.5
1.5
5
7.6
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4391
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Honokaa

USA

1.4
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4392
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Lihue

USA

1.4
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