World's most polluted cities (historical data 2017-2021)

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

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2021

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World air quality report

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2021 World air quality report

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Meets WHO guideline
Exceeds by 1 to 2 times
Exceeds by 2 to 3 times
Exceeds by 3 to 5 times
Exceeds by 5 to 7 times
Exceeds by 7 to 10 times
Exceeds by over 10 times
RankAscending icon
City 2021 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2020 2019 2018 2017
1 Hungary
Szeged, Hungary
26.4 63.1 196.3 12.6 14.1 9.3 13.4 14.3 10.6 12.6 18 20.3 16.3 16.2 15.7 17.3 -
2 Hungary
Sajoszentpeter, Hungary
25.7 43.9 47.9 31.5 16.8 7.4 9.9 11.4 8.2 12.7 28.5 45.7 46.7 21.7 - - -
3 Hungary
Miskolc, Hungary
23.4 37.8 42 27.9 16.3 9 12.3 14.7 9.8 13.6 25.2 37.7 35.4 21 21.9 24.4 -
4 Hungary
Kazincbarcika, Hungary
22.7 39.6 41.1 27.1 14.8 6.3 9 10.2 7.2 11.1 25.1 39.7 39.7 18.5 - - -
5 Hungary
Inarcs, Hungary
17.9 34.8 41.8 28 19.5 7.8 9.9 10.8 6.4 9.8 19.3 25.5 23.6 - - - -
6 Hungary
Nyiregyhaza, Hungary
17.8 22.1 32.3 20.4 13 9.2 13.4 13 10.4 12.2 24 30.5 22.9 15.7 - - -
7 Hungary
Debrecen, Hungary
17.3 21.6 30.6 19.1 12.7 7.6 11.1 12.6 8.9 10.9 21.1 29.3 22.4 16.1 - - -
8 Hungary
Varpalota, Hungary
15.1 23.6 28.4 17.9 13.4 6.4 9.8 9.2 7 11.4 19.6 23.1 20.1 14.7 - - -
9 Hungary
Szolnok, Hungary
15 19.6 23 16.8 12.6 7.6 10.4 12.4 9.6 11.6 18.9 22.8 19.5 15 17.2 - -
10 Hungary
Szazhalombatta, Hungary
14.9 17.3 24.9 16.7 12.1 6.4 12.2 12.1 7.5 11.5 18.9 20.3 17.8 14.9 12.5 13.3 -
11 Hungary
Gyor, Hungary
14.6 15.6 25.4 16.4 11.7 6.8 11.9 13.4 10.8 12.3 16.2 19.3 16.9 12.5 - - -
12 Hungary
Hernadszurdok, Hungary
14.5 21.6 30.6 18.6 11.8 7.3 10.8 13.4 8.5 10.4 15.9 21.3 17.9 13.1 - - -
13 Hungary
Budapest, Hungary
14.2 17.3 24.3 15.8 11.2 6.5 11 10.4 6.9 10.5 16.5 21.7 18.9 13.8 14 16.5 -
14 Hungary
Szentgotthard, Hungary
14.1 18.6 27.6 16.4 12 5.5 13.6 11.7 8 12.7 15.3 14.8 10.4 14.5 12.6 12.2 -
15 Hungary
Pecs, Hungary
14 16.5 24.5 17.2 12.4 6.3 10.3 12 7.3 10.5 16.7 20.2 15.2 14.2 14.7 16.6 -
16 Hungary
Esztergom, Hungary
13.9 18.3 27.3 16.7 10.9 6.3 10.7 11.5 6.9 9.5 14 18.6 17.8 14.5 - - -
17 Hungary
Dunaujvaros, Hungary
13.9 12.6 19.3 12.5 11.5 8.1 12.3 13.4 9 10.6 16.6 23.1 18.3 13.3 - - -
18 Hungary
Szekesfehervar, Hungary
13.3 18.9 25 16.7 12.5 5.8 10.2 10 5.8 10.2 17 20.6 18.2 14.9 - - -
19 Hungary
Veszprem, Hungary
12.5 15.7 19.5 14.6 10.7 6.1 10.6 9.9 6.7 10 14.6 18.6 14.3 12.6 - - -
20 Hungary
Ajka, Hungary
12.4 21 22.1 13.6 12.1 5.1 9.3 8.7 5.4 9.8 15 19.8 18.4 12.1 - - -
21 Hungary
Kecskemet, Hungary
12.3 14 21 13.3 10.4 6.9 9.1 9.2 6.5 9.1 15.1 17.8 18.9 11.9 14.6 - -
22 Hungary
Sopron, Hungary
11.9 13.3 24.5 13.8 10.1 5.2 11 9.9 6.7 11.2 15.2 15.9 16.2 10.8 - - -
23 Hungary
Balassagyarmat, Hungary
9.6 11.9 9.9 12.9 10.2 5 9.7 11.2 6.1 7.6 11.6 12.3 6.4 9.7 - - -

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