SmogRank / Countries / Mexico / September 2025
Most polluted cities in Mexico, September 2025
43 cities in Mexico ranked by their average PM2.5 over the 30 days. Worst: Cholula at 26.5 µg/m³, #78 of 2,439 cities in the world. Cleanest: Pachuca de Soto at 6.0. A city needs measurements on 70% of the days to be ranked.
- 1CholulaPuebla 26.5
- 2XonacatlánMéxico 24.0
- 3San Salvador TizatlalliMéxico 21.1
- 4Santa CatarinaNuevo León 19.8
- 5CuernavacaMorelos 18.1
- 6GarcíaNuevo León 15.6
- 7Naucalpan de JuárezMéxico 14.9
- 8PueblaPuebla 13.4
- 8TijuanaBaja California 13.4
- 10La PazBaja California Sur 13.0
- 10Ciudad Benito JuárezNuevo León 13.0
- 12Ciudad General EscobedoNuevo León 12.6
- 13MoreliaMichoacán 12.1
- 14Tula de AllendeHidalgo 11.9
- 14Mexico CityMexico City 11.9
- 16SalamancaGuanajuato 11.8
- 17ZapopanJalisco 11.7
- 18MonterreyNuevo León 11.5
- 19Santa AnitaJalisco 11.4
- 19San Luis de la PazGuanajuato 11.4
- 21MéridaYucatán 11.3
- 21León de los AldamaGuanajuato 11.3
- 23ChihuahuaChihuahua 11.1
- 24TlaquepaqueJalisco 11.0
- 25San Martin Texmelucan de LabastidaPuebla 10.3
- 26TulancingoHidalgo 9.9
- 27Victoria de DurangoDurango 9.8
- 28Mixquiahuala de JuárezHidalgo 9.6
- 28AguascalientesAguascalientes 9.6
- 30CelayaGuanajuato 9.5
- 31San Miguel de AllendeGuanajuato 9.4
- 32CuautlaMorelos 9.3
- 32Ciudad JuárezChihuahua 9.3
- 34TehuacánPuebla 9.1
- 35Zacatepec de HidalgoMorelos 8.9
- 36TepicNayarit 8.4
- 36Santiago de QuerétaroQuerétaro 8.4
- 38San Juan del RíoQuerétaro 8.1
- 39IrapuatoGuanajuato 8.0
- 40AbasoloGuanajuato 7.1
- 41La Providencia Siglo XXIHidalgo 7.0
- 42ApizacoTlaxcala 6.8
- 43Pachuca de SotoHidalgo 6.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+