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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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
1 Mexico
Toluca, Mexico
27.1 26.6 28.8 32.1 31 32.9 21.4 19.7 20.3 22.1 27.4 28.9 33.8 - - -
2 Mexico
Tijuana, Mexico
26.1 46.1 34.3 26.5 22.1 21.6 22.1 16.6 22.2 31.7 26.3 24 17 - - -
3 Mexico
Puebla, Mexico
24.6 50.1 28.1 14 12.9 12 14 13.3 13.4 22.5 28.9 36.5 47.7 - - -
4 Mexico
Guadalajara, Mexico
24.5 25.1 22 26.5 30.5 27.4 22.9 17.8 14 16.1 26 41 31.3 18.9 - -
5 Mexico
Garcia, Mexico
23.9 31.3 34.6 39.6 32.2 16.4 14.9 18 15.4 23.8 27.5 24.4 17.1 24.3 - -
6 Mexico
Emiliano Zapata, Mexico
23.7 23.6 22.7 29 30.4 30.3 24.5 17.3 15.2 17.3 21.6 25.2 28.1 - - -
7 Mexico
Nezahualcóyotl, Mexico
23.3 25.5 24 27.7 32 29 18.6 17.2 13.5 10.7 - - 26.8 - - -
8 Mexico
Nezahualcoyotl, Mexico
22.9 26.1 25.8 27.6 31.8 28.5 17.8 16.7 13.2 10.4 - - - - - -
9 Mexico
Juarez, Mexico
22.9 11 14.4 25.3 23.3 21.2 17.8 24.8 27.8 23.1 19 19.8 29.5 - - -
10 Mexico
Minatitlan, Mexico
22.9 23.3 22.4 26.7 42 31.2 25.1 22.8 13.8 13.5 15.8 14.8 21 24 - -
11 Mexico
Cadereyta Jimenez, Mexico
22.4 21.4 19.8 21.9 23.4 19.8 26.8 24.5 18.4 24.7 22.1 20 26.4 - - -
12 Mexico
Ecatepec de Morelos, Mexico
21.3 25.7 22.7 24.2 25.5 25 16.1 16.3 14.3 16 21 20.6 24.9 - - -
13 Mexico
Tlalnepantla de Baz, Mexico
21.2 21.5 24.2 23.8 23.6 23.8 21.1 19.7 15.3 19 17.8 - - - - -
14 Mexico
Tlalnepantla, Mexico
21.2 20.9 22.7 23.4 23 23.4 20.9 19.3 15 19.4 17.6 21.6 23.8 - - -
15 Mexico
Venustiano Carranza, Mexico
21.1 21.1 21.1 26 25 25.7 18.9 15.7 17.3 18.4 19.9 27.3 - - - -
16 Mexico
Santa Catarina, Mexico
20.7 25.7 27.5 25.5 21.4 18.5 15.7 19.2 15.4 18.7 20.5 20.3 20.1 22.6 - -
17 Mexico
San Nicolas de los Garza, Mexico
20.1 23.9 24 23.8 19.1 18.2 14.5 18.4 15.4 21.1 20.2 18.8 23.3 20.8 - -
18 Mexico
Mexicali, Mexico
19.7 41.7 24.6 10.6 10.5 8.6 11.5 9.4 10 18.8 23.9 28.5 38 17.7 30.2 22.7
19 Mexico
Cuernavaca, Mexico
19.6 7.1 20 29.6 36 37.8 16.4 8 9.9 13.8 19 16.2 20 22.8 - -
20 Mexico
Azcapotzalco, Mexico
19.2 10.5 21.6 22.3 21.7 22.4 16 16 14.8 16.9 17.8 20.7 23.1 - - -
21 Mexico
Guadalupe, Mexico
19.1 17.7 16.9 18.4 17.6 14.9 14.8 20.9 17 21.3 20.7 21.4 26.8 17.1 - -
22 Mexico
Leon, Mexico
19 25.2 20.6 24.8 23.7 21.6 14.3 15.2 13 14.2 17.7 21.2 18.9 20.9 20.8 27.3
23 Mexico
Silao, Mexico
19 33.8 20.5 22.8 31.1 22.6 15.9 10.2 7.9 8.3 12.6 19.1 27.7 - - -
24 Mexico
General Escobedo, Mexico
18.9 21.5 18.4 20.4 17.7 16.1 11.1 18.9 - - 18.7 18.1 26.3 20.9 - -
25 Mexico
Mexico City, Mexico
18.8 17.2 17.3 21.9 23.3 24.4 13.7 13.4 13.1 16.5 17.7 21.3 25.7 20.5 19.7 20.4
26 Mexico
Celaya, Mexico
18.6 21.3 17.9 21.3 25.2 22.5 12.6 12.7 8.6 12.8 15.9 20.3 22.2 20 20.1 22.2
27 Mexico
Benito Juarez, Mexico
18.4 17.5 16.4 22.3 23.6 29.4 15 13.9 14.2 15.8 16.5 18 21.7 - - -
28 Mexico
Irapuato, Mexico
18.2 20.4 17.2 21.3 24.1 20.5 14.1 14.6 10.8 11.6 16.9 22.7 24 19.2 19.7 23.2
29 Mexico
Alvaro Obregon, Mexico
18.2 19.3 18.4 23.4 26.5 28.4 14.4 13.5 12 12.5 13.5 15.4 20.3 23.9 - -
30 Mexico
Salamanca, Mexico
18 21.1 17.7 21.1 21.9 21.1 14.7 15.5 13.9 13.6 15.1 19.7 20.9 20.9 20.9 25.1
31 Mexico
Patzcuaro, Mexico
18 17.4 15.5 20.5 21.2 26.5 15.6 11.5 12.5 12.7 19.7 19.3 22.3 20.8 - -
32 Mexico
Gustavo A. Madero, Mexico
17.9 19.3 19.3 21.7 23.9 23.4 13.4 13.7 11.2 12.9 16.4 17.9 21.6 22.8 - -
33 Mexico
Durango, Mexico
17.3 17.1 15.2 21.6 16.6 19.1 16.2 13.7 13.5 14.9 20 21.9 30.5 16.7 - -
34 Mexico
Poza Rica de Hidalgo, Mexico
17 14.4 17 19 27.3 19.4 15.2 15.6 9.8 13 26.2 4 12.1 - - -
35 Mexico
Islas Agrarias Grupo A, Mexico
16.3 31.9 18.8 9.7 8.6 7.6 10.3 8.7 9.4 16.6 21.2 20.6 29.3 13.6 - -
36 Mexico
Coyoacan, Mexico
16.2 15.1 14.7 19.7 21.3 21.1 11.4 10.7 11.8 14.2 15.6 18.2 20.5 19.6 - -
37 Mexico
San Luis Potosi, Mexico
16.1 15.6 17.8 16.7 16.7 13.4 15.1 13.8 8.1 10.1 13.3 22.7 27.2 - - -
38 Mexico
Naucalpan de Juarez, Mexico
15.9 17.2 18.2 23.6 19.4 14.8 13.2 14.7 10.8 10.9 14 17.1 17.4 - - -
39 Mexico
Cuajimalpa de Morelos, Mexico
15.6 15.1 16.6 18.9 19.4 20.8 13.7 13.1 11.8 13.3 12.7 21.8 - - - -
40 Mexico
San Pedro Garza Garcia, Mexico
15.6 14.8 14.7 19.9 18.1 15.1 11.2 16.4 6.2 15.1 19.6 18.8 17.4 16.6 - -
41 Mexico
Monterrey, Mexico
14.5 16.6 13.1 14.8 13.1 11.1 9.1 14.4 9.5 14.3 18.7 18.6 20.4 19.3 17.2 15.7
42 Mexico
Chihuahua, Mexico
13.2 13.9 10.4 7.9 9.3 11.4 13.7 12 12 11.6 15.8 15.6 21.7 - - -
43 Mexico
Puebla, Mexico
13 16 17.4 19.8 16.7 18.5 7 10.7 4.2 6.1 9.2 12 14.4 - - -
44 Mexico
Pachuca de Soto, Mexico
12.8 14.5 16 18.6 21.1 19.2 12.8 11.8 6.2 5.9 7.5 7.8 12.7 15.5 13.3 29.8
45 Mexico
Oaxaca, Mexico
12.7 9.6 9.3 14.7 25.4 21.7 8.5 9.7 6.3 8.6 8.7 7.1 - 10 - -
46 Mexico
Guanajuato, Mexico
12.6 12.6 12.5 15.9 16.7 15 12.1 12.8 9.9 9.4 9.8 11.1 12.8 12.8 9 -
47 Mexico
San Miguel de Allende, Mexico
12.4 14 12.6 14.7 16.3 14.9 9.7 11.1 7.8 8.5 10.5 13.6 15.2 14 - -
48 Mexico
Tulancingo, Mexico
12.4 12.7 12.5 15.4 18.8 17.6 11.5 12.6 7.6 8.6 10.5 9.5 14.2 - - -
49 Mexico
Tlalpan, Mexico
12.3 13 12 14.9 15 16.3 12.6 12.4 8.1 9.2 8.9 13.1 12 18.4 - -
50 Mexico
Abasolo, Mexico
12.1 14.3 10.9 14.1 14.3 15.1 7.4 9.3 8.6 11.5 9.7 11.9 17.8 13.6 13 -

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