SmogRank / Countries / Mexico / August 2026
Most polluted cities in Mexico, August 2026
47 cities in Mexico ranked by their average PM2.5 over the 31 days. Worst: Saltillo at 184.6 µg/m³, #1 of 2,312 cities in the world. Cleanest: Tepic at 7.2. A city needs measurements on 70% of the days to be ranked.
- 1SaltilloCoahuila 184.6
- 2San Luis PotosíSan Luis Potosí 29.3
- 3TuxtlaChiapas 27.9
- 4Hacienda Santa FeJalisco 26.3
- 5MéridaYucatán 23.7
- 6Ciudad NezahualcoyotlMéxico 21.0
- 6Parque Industrial Ciudad MitrasNuevo León 21.0
- 8AtlixcoPuebla 19.9
- 9Naucalpan de JuárezMéxico 19.7
- 10PueblaPuebla 19.2
- 11Santa CatarinaNuevo León 18.7
- 12Ciudad General EscobedoNuevo León 18.6
- 13GuadalajaraJalisco 18.5
- 14Silao de la VictoriaGuanajuato 18.1
- 14AguascalientesAguascalientes 18.1
- 16CelayaGuanajuato 17.5
- 17Mexico CityMexico City 17.2
- 18SalamancaGuanajuato 16.4
- 19TlaquepaqueJalisco 16.2
- 20León de los AldamaGuanajuato 15.6
- 21MonterreyNuevo León 15.5
- 21Ciudad ApodacaNuevo León 15.5
- 23San Luis de la PazGuanajuato 15.3
- 24TulancingoHidalgo 14.2
- 25Cadereyta JiménezNuevo León 13.9
- 25ZapopanJalisco 13.9
- 27Pachuca de SotoHidalgo 13.8
- 28Ciudad Benito JuárezNuevo León 13.6
- 29TehuacánPuebla 13.5
- 29Mixquiahuala de JuárezHidalgo 13.5
- 31Santiago de QuerétaroQuerétaro 13.2
- 32ChihuahuaChihuahua 13.0
- 33TijuanaBaja California 12.8
- 34San Juan del RíoQuerétaro 12.3
- 35San Miguel de AllendeGuanajuato 11.8
- 35MexicaliBaja California 11.8
- 37CuernavacaMorelos 11.7
- 37IrapuatoGuanajuato 11.7
- 37Ciudad JuárezChihuahua 11.7
- 40CuautlaMorelos 10.8
- 40La Providencia Siglo XXIHidalgo 10.8
- 42Zacatepec de HidalgoMorelos 10.7
- 42GuanajuatoGuanajuato 10.7
- 44Tula de AllendeHidalgo 10.5
- 44GarcíaNuevo León 10.5
- 46AbasoloGuanajuato 10.1
- 47TepicNayarit 7.2
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+