SmogRank / Countries / Mexico / September 2026
Most polluted cities in Mexico, September 2026
41 cities in Mexico ranked by their average PM2.5 over the 30 days. Worst: San Luis Potosí at 31.7 µg/m³, #79 of 2,332 cities in the world. Cleanest: Ciudad Juárez at 7.0. A city needs measurements on 70% of the days to be ranked.
- 1San Luis PotosíSan Luis Potosí 31.7
- 2TuxtlaChiapas 29.1
- 3Hacienda Santa FeJalisco 24.0
- 4San Salvador TizatlalliMéxico 19.0
- 5Ciudad NezahualcoyotlMéxico 18.0
- 6Naucalpan de JuárezMéxico 17.8
- 6Santa AnitaJalisco 17.8
- 6AguascalientesAguascalientes 17.8
- 9GuadalajaraJalisco 17.5
- 10SaltilloCoahuila 17.3
- 11PueblaPuebla 15.3
- 12Mexico CityMexico City 14.9
- 12Parque Industrial Ciudad MitrasNuevo León 14.9
- 14Ciudad General EscobedoNuevo León 14.7
- 15TlaquepaqueJalisco 14.5
- 16CelayaGuanajuato 14.1
- 17SalamancaGuanajuato 13.9
- 18León de los AldamaGuanajuato 13.4
- 19IrapuatoGuanajuato 13.0
- 20MonterreyNuevo León 12.9
- 21TijuanaBaja California 12.8
- 22Santa CatarinaNuevo León 12.5
- 23TulancingoHidalgo 11.9
- 23San Luis de la PazGuanajuato 11.9
- 23Ciudad ApodacaNuevo León 11.9
- 26ZapopanJalisco 11.7
- 27TepicNayarit 11.6
- 28MexicaliBaja California 11.5
- 29CuautlaMorelos 11.4
- 30Santiago de QuerétaroQuerétaro 11.1
- 30Ciudad Benito JuárezNuevo León 11.1
- 32San Juan del RíoQuerétaro 10.8
- 33Cadereyta JiménezNuevo León 10.6
- 34GarcíaNuevo León 9.0
- 34La Providencia Siglo XXIHidalgo 9.0
- 36Pachuca de SotoHidalgo 8.8
- 37San Miguel de AllendeGuanajuato 8.5
- 37AbasoloGuanajuato 8.5
- 39Zacatepec de HidalgoMorelos 8.0
- 40Tula de AllendeHidalgo 7.9
- 41Ciudad JuárezChihuahua 7.0
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+