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2017-2023
World's most polluted cities
Most polluted city ranking based on annual average PM2.5 concentration (μg/m³)
2023
World Air Quality Report
PM2.5 legend
0-5
Meets WHO guideline
5.1-10
Exceeds by 1 to 2 times
10.1-15
Exceeds by 2 to 3 times
15.1-25
Exceeds by 3 to 5 times
25.1-35
Exceeds by 5 to 7 times
35.1-50
Exceeds by 7 to 10 times
>50.1
Exceeds by over 10 times
Rank | City | 2023 | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Xonacatlan, Mexico | 29.2 | 33.9 | 32.7 | 30.6 | 31.7 | 32 | 24.7 | 24.4 | 25.2 | 26.4 | 26.6 | -- | -- | 28.5 | -- | -- | -- | -- | -- |
| 2 | Toluca de Lerdo, Mexico | 28.3 | 36 | 31.6 | 30.3 | 32.2 | 34.5 | 28.8 | 20.9 | 21.8 | 23.5 | 21.6 | -- | -- | -- | -- | -- | -- | -- | -- |
| 3 | Guadalajara, Mexico | 25.8 | 34.1 | 35.3 | 36 | 34.6 | 36.8 | 35.5 | 20.5 | 16.3 | 17.7 | 13.8 | 13.1 | 16.9 | 26.7 | 25.4 | 24.5 | 18.9 | -- | -- |
| 4 | San Miguel Totocuitlapilco, Mexico | 25.7 | 30.9 | 25.2 | 28.1 | 32.7 | 33.9 | 24.6 | 17.6 | 17.4 | 20.7 | 16 | 13.6 | -- | -- | -- | -- | -- | -- | -- |
| 5 | Atotonilco de Tula, Mexico | 25.1 | 26.2 | 26.3 | 30.5 | 29 | 28.1 | 35.8 | 18.2 | 16.7 | 20.3 | 16.1 | -- | -- | 26.5 | 34.3 | -- | -- | -- | -- |
| 6 | Ajalpan, Mexico | 24.3 | 29.5 | 26.9 | 39 | 34.9 | 37.7 | 37.7 | 13.9 | 10.9 | 12.8 | 8.7 | 8.9 | 9.2 | 28.1 | -- | -- | -- | -- | -- |
| 7 | Celaya, Mexico | 24.2 | 27.9 | 32.1 | 34.7 | 35.4 | 34.7 | 23.2 | 15.5 | 15.4 | 14.8 | 14.6 | 18.8 | 23.2 | 19.2 | 19.3 | 18.6 | 20 | 20.1 | 22.2 |
| 8 | Cuidad Juarez, Mexico | 23 | 29.3 | 27.8 | 35.2 | 31.2 | 26 | 30.4 | 17.4 | 15.9 | 15.4 | 16.2 | 17.3 | 19.4 | -- | -- | -- | -- | -- | -- |
| 9 | Mexico City, Mexico | 22.3 | 32.2 | 25.9 | 27 | 28.5 | 30.5 | 21.8 | 15.7 | 14.6 | 18.2 | 13.5 | 17.4 | 22.1 | 22.1 | 21.7 | 18.8 | 20.5 | 19.7 | 20.4 |
| 10 | Cuidad de Mexico, Mexico | 22.1 | 29 | 25.1 | 26.1 | 28.3 | 30.6 | 22.4 | 18.2 | 15.4 | 16.3 | 14.9 | 15.8 | 22.7 | -- | -- | -- | -- | -- | -- |
| 11 | Morelia, Mexico | 21.6 | 36.3 | 37.2 | 25.3 | 38.5 | 38.8 | 23.7 | 15.9 | 15.2 | 18.7 | 12.9 | 13.4 | 14.8 | 19.9 | 21.9 | -- | 16.5 | -- | -- |
| 12 | Progreso, Mexico | 21.3 | 32.2 | 27 | 18.4 | 17.3 | 15.5 | 18.4 | 21.5 | 16.5 | 19.5 | 18 | 29.1 | 36.2 | 58 | 33.8 | -- | -- | -- | -- |
| 13 | Salamanca, Mexico | 21.3 | 28.9 | 24.3 | 24.5 | 23.8 | 29.7 | 25.2 | 17.6 | 13.3 | 16.6 | 16.2 | 17.8 | 13.8 | 20 | 19.6 | 18 | 20.9 | 20.9 | 25.1 |
| 14 | Garcia, Mexico | 20.6 | 28.2 | 23.4 | 26.2 | 23.9 | 25.8 | 28.5 | 12.2 | 10.9 | 9.4 | 18 | 19.2 | 21.8 | 24.6 | 19.9 | 23.9 | 24.3 | -- | -- |
| 15 | General Escobedo, Mexico | 19.8 | 27.5 | 18 | 21.7 | 17.4 | 19.4 | 19.4 | 15.2 | 20.1 | 16 | 16.5 | 20 | 25.1 | 21.6 | 23.1 | 18.9 | 20.9 | -- | -- |
| 16 | San Nicolas de los Garza, Mexico | 19.3 | 25.3 | 19.5 | 23.9 | 19.6 | 23.1 | 21.1 | 12.3 | 14 | 13.5 | 15.8 | 19.2 | 24.8 | 20.2 | 20.1 | 20.1 | 20.8 | -- | -- |
| 17 | Puebla, Mexico | 19.3 | 24.9 | 18.5 | 22.8 | 23.5 | 24.7 | 23.4 | 13 | 11.8 | 13.4 | 10.8 | -- | -- | 13 | 9.8 | 13 | -- | -- | -- |
| 18 | Patzcuaro, Mexico | 18.6 | 21.5 | 18 | 16.9 | 22.8 | 30.9 | 23.6 | 14.2 | 13.2 | 20.2 | 12.3 | 13.5 | 16 | 21.1 | 21.1 | 18 | 20.8 | -- | -- |
| 19 | Santa Catarina, Mexico | 18.6 | 20.7 | 20.2 | 22.8 | 21.1 | 22.6 | 22.9 | 15.4 | 13.9 | 14.3 | 14.6 | 15.6 | 19.3 | 21.5 | 21.9 | 20.7 | 22.6 | -- | -- |
| 20 | Nezahualcoyotl, Mexico | 18.5 | 23.4 | 21 | 20.9 | 21.3 | 23.3 | 7 | 11.5 | 10.6 | 11.1 | -- | -- | 21.1 | -- | -- | -- | -- | -- | -- |
| 21 | San Borja, Mexico | 18.1 | 17.8 | 15.9 | 16 | 17.9 | 20.6 | -- | 19.6 | 18.2 | 18.9 | 20.1 | 17.5 | 16.7 | -- | -- | -- | -- | -- | -- |
| 22 | Magdalena Contreras, Mexico | 17.9 | 21.9 | 19 | 16.5 | 19.5 | 22.9 | 17.3 | 16.3 | 13.8 | 16.2 | 14.2 | 16.6 | 21.1 | 25.5 | -- | -- | -- | -- | -- |
| 23 | Guadalupe, Mexico | 17.9 | 18.7 | 19.3 | 21.6 | 21.7 | 15.7 | 19.7 | 14.3 | 14 | 11.9 | 14 | 19 | 25.7 | 17.2 | 22.1 | 19.1 | 17.1 | -- | -- |
| 24 | Leon, Mexico | 17.3 | 22.8 | 20.3 | 22.2 | 21.2 | 26.1 | 17.7 | 13.1 | 10.1 | 12.1 | 11.4 | 14.9 | 14 | 17 | 16.6 | 19 | 20.9 | 20.8 | 27.3 |
| 25 | Silao, Mexico | 17.3 | 23.1 | 21.9 | 24.5 | 23.3 | 25.7 | 14.7 | 12 | 9.6 | 8.4 | 10.2 | 17.6 | 17.9 | 16.4 | 18.6 | 19 | -- | -- | -- |
| 26 | Monterrey, Mexico | 17.1 | 19.5 | 17.4 | 22.5 | 19.5 | 20.9 | 21.2 | 13.2 | 12 | 12.2 | 13.5 | 16.2 | 17.5 | 18.1 | 20.1 | 14.5 | 19.3 | 17.2 | 15.7 |
| 27 | San Pedro Garza Garcia, Mexico | 16.6 | 18.7 | 17.1 | 21.4 | 19.3 | 20.7 | 20.6 | 13.6 | 12.5 | 13.1 | 13.6 | 14.6 | 13.8 | 19 | 20.8 | 15.6 | 16.6 | -- | -- |
| 28 | Ciudad de Allende, Mexico | 16.1 | 19.4 | 17.6 | 21.4 | 18.3 | 21 | 21.3 | 12.5 | 13.7 | 12.5 | 11.3 | 10.3 | 14.3 | 13.9 | -- | -- | -- | -- | -- |
| 29 | Tlalixtac de Cabrera, Mexico | 16.1 | 16.9 | 16.8 | 21.2 | 25.3 | 31.5 | 25.8 | 11.2 | 9.9 | 10.6 | 7.8 | 6.6 | 7.5 | 15.6 | 11.7 | -- | -- | -- | -- |
| 30 | Irapuato, Mexico | 15.8 | 25.7 | 21.5 | 20.2 | 18.9 | 20 | 15 | 10.6 | 8.5 | 8.3 | 8.4 | 13.8 | 17.1 | 18.1 | 17.9 | 18.2 | 19.2 | 19.7 | 23.2 |
| 31 | Ciudad de Mexico, Mexico | 15.7 | 22.7 | 19.6 | 19.8 | 20.2 | 21.2 | 16.2 | 12 | 11 | 12.4 | 6.8 | 8.7 | 17.9 | -- | -- | -- | -- | -- | -- |
| 32 | Tijuana, Mexico | 15.6 | 14.9 | 16.3 | 13.6 | 18.9 | 12.3 | 10.4 | 18 | 14.4 | 15.2 | 14.3 | 15.8 | 22.7 | 18 | 14.5 | 26.1 | -- | -- | -- |
| 33 | Cadereyta Jimenez, Mexico | 15.4 | 17.9 | 13.7 | 18.2 | 16.7 | 17.6 | 18.7 | 11.6 | 13.9 | 13.1 | 11.5 | 12.9 | 18.8 | 14.8 | 22 | 22.4 | -- | -- | -- |
| 34 | Huautla de jimenez, Mexico | 15.3 | 19.1 | 15.2 | 18.5 | 22.8 | 28.4 | 18.9 | 7.8 | 8.2 | 8.1 | 7.2 | 6.9 | 9 | -- | -- | -- | -- | -- | -- |
| 35 | San Luis de la Paz, Mexico | 14.2 | 16.8 | 14.8 | 17.4 | 16.7 | 18.8 | 17.4 | 13.4 | 12.1 | 12.1 | 10 | 10 | 11 | 13.9 | 11.1 | 10.9 | 11.9 | -- | -- |
| 36 | San Miguel de Allende, Mexico | 14.1 | 16.6 | 15.8 | 17.8 | 16.8 | 18.8 | 15.5 | 11.3 | 9.7 | 9.9 | 7.4 | 8.6 | 10.5 | 13.8 | 12.5 | 12.4 | 14 | -- | -- |
| 37 | Torreon, Mexico | 14 | -- | -- | 15.2 | 11.9 | 15.5 | 16.2 | 10.6 | 9.4 | 14.1 | 12.1 | 18.8 | 19.1 | 15.9 | 23.4 | -- | -- | -- | -- |
| 38 | Mexicali, Mexico | 13.8 | 19.4 | 14.9 | 8.7 | 11.2 | 6.6 | 8.5 | 10.4 | 8.4 | 11.7 | 13.2 | 19.4 | 33.3 | 14.4 | 15.9 | 19.7 | 17.7 | 30.2 | 22.7 |
| 39 | Santiago, Mexico | 13.8 | 13.3 | 12 | 20 | 17.2 | 18.6 | 19.6 | 11.1 | 10.8 | 10.5 | 10.3 | 9.3 | 12.6 | 10 | 13.3 | -- | -- | -- | -- |
| 40 | Guanajuato, Mexico | 13.4 | 15.2 | 14 | 16.2 | 17.6 | 22.2 | 15.9 | 11.5 | 10.7 | 9.2 | 8.2 | 9.8 | 9.7 | 12.9 | 12.3 | 12.6 | 12.8 | 9 | -- |
| 41 | Abasolo, Mexico | 13 | 18.4 | 14.7 | 13.6 | 15.4 | 21.2 | 14.6 | 10.4 | 8.5 | 10 | 7.4 | 9.5 | 12.1 | 12.7 | 13.9 | 12.1 | 13.6 | 13 | -- |
| 42 | Santiago de Queretaro, Mexico | 13 | 18.4 | 14.6 | 15.7 | 16.7 | 20.7 | 13.8 | 10 | 9.8 | 10.4 | 7.6 | 7.9 | 10.2 | 12.9 | 6.7 | 6.3 | 9.2 | -- | -- |
| 43 | Kanasin, Mexico | 11.6 | 11.2 | 12.5 | 12.9 | 12.7 | 17.3 | 11.7 | 10.7 | 11.9 | 11.3 | 9.6 | 7.2 | 10 | 14.5 | -- | -- | -- | -- | -- |
| 44 | Bacalar, Mexico | 10 | 10.4 | 10.8 | 13.4 | 15.3 | 13.1 | 9.6 | 8.7 | 9.2 | 8.9 | 7.1 | 5.9 | 6.7 | 9.1 | 8.9 | -- | -- | -- | -- |
| 45 | Chetumal, Mexico | 8.3 | 15.3 | 12.7 | 11.9 | 12.7 | 10.7 | 7.4 | 6.8 | 8.2 | 5.8 | 4.9 | 4.1 | 4.8 | 6.8 | 7.1 | -- | -- | -- | -- |
| 46 | Las Jarretaderas, Mexico | 8.1 | 10.7 | 10.1 | 7.7 | 9.7 | 14.6 | 10.4 | 3.3 | 3.7 | 6.1 | 4 | 7.9 | 7.5 | 9 | 16 | -- | -- | -- | -- |
| 47 | Motul, Mexico | 8.1 | 6.4 | 8 | 12.2 | 10.7 | 10.5 | 6 | 8.7 | 8.4 | 7.5 | 5 | 4.1 | 4.8 | 6 | -- | -- | -- | -- | -- |
| 48 | El Paraiso, Mexico | 7.1 | 4.9 | 7.1 | 9.6 | 9.9 | 10 | 6.4 | 8.5 | 8.8 | 7.5 | 4.7 | 3.6 | 3.7 | -- | -- | -- | -- | -- | -- |
| 49 | Cuidad Juarez, Mexico | 6.8 | 13.5 | 10.1 | 4.7 | 3.9 | 5.1 | 8.1 | 5.5 | 6.1 | 5 | 6 | 8 | -- | -- | -- | -- | -- | -- | -- |
| 50 | Merida, Mexico | 6.8 | 5.1 | 7.3 | 9.8 | 9.7 | 10.3 | 5.7 | 6.9 | 7.4 | 6.5 | 4.5 | 3 | 5 | 5.4 | 15.7 | -- | -- | -- | -- |
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