SmogRank / Countries / Mexico / July 2025
Most polluted cities in Mexico, July 2025
42 cities in Mexico ranked by their average PM2.5 over the 31 days. Worst: San Francisco Tlalcilalcalpan at 26.2 µg/m³, #65 of 2,283 cities in the world. Cleanest: Zacatepec de Hidalgo at 4.2. A city needs measurements on 70% of the days to be ranked.
- 1San Francisco TlalcilalcalpanMéxico 26.2
- 2XonacatlánMéxico 25.8
- 3TuxtlaChiapas 24.3
- 4San Salvador TizatlalliMéxico 21.8
- 5GarcíaNuevo León 20.9
- 6Tepeji del Río de OcampoHidalgo 20.2
- 6SaltilloCoahuila 20.2
- 6La Providencia Siglo XXIHidalgo 20.2
- 9Ciudad Benito JuárezNuevo León 19.6
- 10MéridaYucatán 18.8
- 11ApizacoTlaxcala 18.7
- 12Santa CatarinaNuevo León 17.7
- 13CelayaGuanajuato 16.9
- 14MonterreyNuevo León 16.4
- 14León de los AldamaGuanajuato 16.4
- 16Mexico CityMexico City 15.7
- 17PueblaPuebla 14.9
- 18San Martin Texmelucan de LabastidaPuebla 14.7
- 19TehuacánPuebla 14.3
- 20Mixquiahuala de JuárezHidalgo 14.0
- 21TlaquepaqueJalisco 13.8
- 22TulancingoHidalgo 13.2
- 23Tula de AllendeHidalgo 12.8
- 24TlaxcalaTlaxcala 12.3
- 25Santiago de QuerétaroQuerétaro 12.2
- 26Ciudad JuárezChihuahua 12.1
- 27San Juan del RíoQuerétaro 11.6
- 28MoreliaMichoacán 11.4
- 29San Luis PotosíSan Luis Potosí 11.1
- 30San Miguel de AllendeGuanajuato 10.9
- 30AguascalientesAguascalientes 10.9
- 32Silao de la VictoriaGuanajuato 10.8
- 33MexicaliBaja California 10.5
- 34TijuanaBaja California 9.9
- 35AbasoloGuanajuato 9.6
- 36TepicNayarit 9.4
- 37Pachuca de SotoHidalgo 8.6
- 38ZapopanJalisco 8.5
- 38ChihuahuaChihuahua 8.5
- 40La PazBaja California Sur 7.3
- 41CuautlaMorelos 5.3
- 42Zacatepec de HidalgoMorelos 4.2
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+