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 France
Saint-Denis, France
17.4 22.7 19.4 20.3 18.1 12.6 14.6 15.6 13.3 16.1 17.1 21.1 17.7 15.9 16.3 17.6 19.5
2 France
Biot, France
14.5 19.8 19.3 20.2 13 7.9 14.3 12.1 11 14.8 13.5 13.3 15 - - - -
3 France
Roubaix, France
13.9 13 17.1 20.1 17.7 10.4 13.1 11.4 8.8 15.6 11.8 15.2 14.4 - 14.2 14.9 14.9
4 France
Paris, France
13.7 17.4 17.5 19.1 17.8 8.3 11 11 7.9 13.2 12.2 16.3 13.4 12.2 14.7 15.6 15.4
5 France
Saint-Andre, France
13.7 - 24.9 18.2 12.8 7.2 13.8 11.9 10.9 14.6 13.1 14.7 17.7 - - - -
6 France
Mantes-La-Jolie, France
13.4 21.4 16.9 19.4 18.8 7.7 10.9 10.2 7.4 13.9 13.3 3.3 1.8 - - - -
7 France
Saint-Quentin, France
12.6 14.2 14.2 16.3 17.5 8.2 12.7 12.3 8.2 11.2 10.5 13.3 12.3 11.1 12.2 14.3 13.4
8 France
La Mulatiere, France
12.5 16.6 16.9 14.8 10.2 7.2 9.6 10.2 8.5 9.8 12.3 14.7 18.3 14.6 12.8 14.1 15.1
9 France
Marignane, France
12.4 16 15.1 16.3 10.9 7.6 9.1 8.2 9.1 10.3 11 12.7 21.6 12 - - -
10 France
Marseille 16, France
12.3 - - 15.8 13.9 7.1 12.2 10.1 9.8 12.5 12.3 12.9 16.6 - - - -
11 France
Gardanne, France
12.2 15.7 14.8 15.1 10.1 7.5 10.1 9.2 10.4 8.8 10.9 14.2 19.8 11.3 11.2 12.1 12.2
12 France
Romans-sur-Isere, France
12.1 16.1 17.5 15.4 10.6 4.4 8.6 7.7 7.4 8.9 10.9 16.4 21.4 11.5 9.8 - -
13 France
Valenciennes, France
12 - - 14.1 16.6 8.1 12.8 9.9 7.7 14.2 10.3 14.7 12.9 10 11.3 15.3 15.1
14 France
Crolles, France
11.9 20.5 21.8 13.3 8.8 4 8.1 7.2 6 7.1 8.7 17.9 18.3 9.9 - - -
15 France
Lille, France
11.9 13 12.6 15.6 16.4 7.8 11.8 9.6 7.5 14.1 10 13.3 12.2 10.1 11.8 14.3 14.2
16 France
Rouen, France
11.8 17.1 13.9 14.8 13.4 7.4 9.3 8.9 7.5 10.6 10.9 15.2 13 9.6 12.5 12.6 10.7
17 France
Lyon, France
11.7 15.6 16.6 15.2 10.3 5.6 8.8 8.5 7.7 9.7 11.3 15 15 11.7 11.4 11.7 15
18 France
Amiens, France
11.7 13.8 14.9 16.8 15.3 7.8 10.3 9.5 6.7 12.3 9.6 12.1 11.5 - 11.1 - -
19 France
Mulhouse, France
11.6 12.2 16.2 13.3 10.6 5.8 11.2 8.4 8.7 11.3 13.9 16.3 11.9 12 11.7 13 14.2
20 France
Bethune, France
11.6 12.4 13 16.3 15 7.8 11.3 8.7 6.3 13.7 9.7 13.8 11.7 10.3 11.4 13.9 13.4
21 France
Beauvais, France
11.4 14.1 14.2 18 16.9 10.6 10.1 10.7 5.8 8.6 7.3 8.3 8 9.9 - - -
22 France
Creil, France
11.3 14.5 14.3 15.7 15 6.3 7.7 8.4 7.9 11.7 10.8 12.6 11.6 9.9 10.1 12.5 12
23 France
Bobigny, France
11.3 15.9 14.5 16 14.5 7.3 7.8 8.7 6.7 11 11 12.1 10.8 10.6 10 11.2 11.2
24 France
Frejus, France
11.3 13.9 15.1 14.5 9.5 6.7 9.5 8.4 9.2 9 10.1 11.7 18 11.2 - - -
25 France
Dieppe, France
11.2 11.3 12 13.7 13.8 8.8 10 10 8.5 12.8 9.4 11.9 12.5 9.6 11.2 12.4 -
26 France
Saint-Martin-d'Heres, France
11.1 15.2 17.9 12.8 8.3 3.3 8.1 7.1 6.9 8.2 8.3 15.5 18.5 9.7 - - -
27 France
Tours, France
11.1 16.4 13.4 15.4 13 7.5 8.2 8.5 6.9 8.5 10.4 13.3 11.5 10.2 11.1 - -
28 France
Gennevilliers, France
11.1 14.5 13.7 15.8 15.3 6.2 7.9 8.2 6.7 10.1 9.8 15.8 10.5 9 11.9 13 12.7
29 France
Gonesse, France
11.1 14.9 13.9 16.1 13.9 7.1 7 7.3 6.6 9 10.6 14.5 12.4 9.5 11.1 12.4 12
30 France
Rognac, France
11.1 14.2 15.3 15.2 11.1 7.8 9.8 8.6 9.4 8.9 9.3 8.6 14.8 10.9 - - -
31 France
Strasbourg, France
10.9 12 17.8 12.9 10.5 5.3 10.3 7.5 6.9 10.2 12.5 13.5 11.7 10.6 14 14.4 15.9
32 France
Trois-Rivieres, France
10.9 6.7 10.1 7.4 10.2 9 14.8 15.1 16.8 9.4 19.2 4.5 7.7 9.2 - - -
33 France
Melun, France
10.9 16.8 14.3 16.2 12.8 6.7 7 6.8 6.6 8.5 10.3 14.4 11.1 10.8 13.6 14.1 12.9
34 France
Le Havre, France
10.9 11.7 12.5 14.3 13.7 8.3 9.5 8.8 7.4 11.7 9.5 11.9 11.4 8.4 9.7 10 10.1
35 France
Passy, France
10.8 19 15.3 12.6 9 5.3 5.8 6.6 6 6.7 7.6 15.7 20.3 10.9 10 11.1 17.1
36 France
Reims, France
10.8 12.3 13.3 16.6 15.1 7 10.4 8.9 7.6 8.3 8.3 11.9 10.3 10 11.2 13.1 13.3
37 France
Campagne-les-Boulonnais, France
10.8 8.8 12.8 15.1 13.7 8.4 10.7 9.2 6.5 13.6 9.7 10.2 12.2 9.1 9.9 12.8 11.3
38 France
Ternay, France
10.7 14.6 14.3 12.5 8 4.8 7.9 7.5 7.4 8.1 10.1 16 16.3 9 - - -
39 France
Valence, France
10.7 14.5 15.3 13.4 10 4.2 7.8 7.3 7.2 8.3 9.6 14.7 16.1 10 10.9 11.2 -
40 France
Vitry-Sur-Seine, France
10.7 15.1 14.7 15.6 13.3 5.2 7.2 7.8 7.1 9 9.1 13.2 11 10.1 10.9 13.4 11.8
41 France
Chambery, France
10.6 12.2 14.9 11.2 7.4 3.3 6.9 5.9 5.9 8.7 10.2 18.6 18.9 8.7 8.6 10.6 13.3
42 France
Lunéville, France
10.5 10.2 15.1 14.3 11 5.7 11 8.2 7.8 9.4 10.9 12.7 10.1 10.2 10.5 12.2 12.1
43 France
Nancy, France
10.5 10.1 12.2 12.9 11.6 6.5 12.7 8.6 7.8 9.5 10.4 12.9 11.2 9.5 9.4 10.9 10.8
44 France
Saint-Martin-Boulogne, France
10.5 10.7 12.3 14.3 11.9 8.2 11.2 10 6.4 12.5 8.6 10.5 10.4 - - - -
45 France
Avignon, France
10.5 11.5 17.2 14.3 9.6 4.2 8 6.8 7.3 8.4 9.8 12.2 17 10.3 11 11.8 12.7
46 France
Vaulx-en-Velin, France
10.4 14.7 14.5 13.8 8.8 3.7 7.6 7.5 6.7 7.7 9.8 13.4 14.8 10.7 10.6 10.8 11.4
47 France
Saint-Jean-de-Braye, France
10.4 15.7 12.4 15.1 12 4.5 5.6 7 5.9 7.4 10.3 16.3 12 8.9 9.9 10.7 11.9
48 France
Douai, France
10.4 12.7 14.8 13.2 17.1 6.4 10.2 8.1 6.8 11.2 7.9 10.4 10 12 12.3 15 13.5
49 France
Kuntzig, France
10.3 14 13.1 14 10.8 5 8 7.2 6.8 7.8 9.8 14.4 11.3 8.4 - - -
50 France
Sainte-Luce, France
10.3 7.4 10.8 7.6 14 12.1 13.3 12.4 11.2 9.4 18 4.1 6.6 9.4 8.9 - -

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