SmogRank / Countries / Mexico / September 2023
Most polluted cities in Mexico, September 2023
38 cities in Mexico ranked by their average PM2.5 over the 30 days. Worst: Mexicali at 34.3 µg/m³, #20 of 1,830 cities in the world. Cleanest: San Juan del Río at 6.5. A city needs measurements on 70% of the days to be ranked.
- 1MexicaliBaja California 34.3
- 2XonacatlánMéxico 27.8
- 3TlaquepaqueJalisco 27.4
- 4San Francisco TlalcilalcalpanMéxico 26.6
- 5ZapopanJalisco 25.6
- 6San Salvador TizatlalliMéxico 24.8
- 7TolucaMéxico 24.1
- 8GuadalajaraJalisco 20.3
- 9Ciudad NezahualcoyotlMéxico 19.0
- 10Ciudad ApodacaNuevo León 18.8
- 11Ciudad JuárezChihuahua 18.6
- 12SaltilloCoahuila 18.3
- 13Naucalpan de JuárezMéxico 18.1
- 14CuernavacaMorelos 17.8
- 15Santa CatarinaNuevo León 17.4
- 16SalamancaGuanajuato 16.6
- 17TijuanaBaja California 16.2
- 18CelayaGuanajuato 14.9
- 19PueblaPuebla 14.8
- 20Mexico CityMexico City 14.6
- 21Ciudad Benito JuárezNuevo León 14.3
- 22ChihuahuaChihuahua 12.9
- 22Jardines de la SillaNuevo León 12.9
- 24MonterreyNuevo León 12.8
- 25Tula de AllendeHidalgo 12.4
- 26León de los AldamaGuanajuato 12.3
- 26Ciudad General EscobedoNuevo León 12.3
- 28San Luis de la PazGuanajuato 12.2
- 29San Andrés TuxtlaVeracruz 12.0
- 30Santiago de QuerétaroQuerétaro 11.6
- 31Cadereyta JiménezNuevo León 10.7
- 32San Miguel de AllendeGuanajuato 10.5
- 33AbasoloGuanajuato 10.4
- 34GuanajuatoGuanajuato 9.9
- 35TlaxcalaTlaxcala 8.1
- 36Pachuca de SotoHidalgo 7.7
- 37GarcíaNuevo León 7.6
- 38San Juan del RíoQuerétaro 6.5
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
All cities in the world, September 2023 · Mexico now
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SmogRank, most polluted cities in Mexico, PM2.5, September 2023, smogrank.com/mx/history/2023-09 (accessed 2 Oct 2026).
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