SmogRank / World / Mexico / July 2026

Most polluted cities in Mexico, July 2026

47 cities in Mexico ranked by their average PM2.5 over the 31 days. Worst: San Luis Potosí at 27.0 µg/m³, #179 of 2,751 cities in the world. Cleanest: Victoria de Durango at 0.0. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Ciudad Nezahualcoyotl 10% 9%0
Every city in Mexico ranked for July 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Ciudad NezahualcoyotlMéxico
    10%
  2. 2AguascalientesAguascalientes
    6%
  3. 3TijuanaBaja California
    3%
  4. 4San Luis PotosíSan Luis Potosí
    3%
  5. 5Naucalpan de JuárezMéxico
    3%
  6. 6TuxtlaChiapas
    0%
  7. 7Ciudad General EscobedoNuevo León
    0%
  8. 8Atotonilco de TulaHidalgo
    0%
  9. 9MexicaliBaja California
    0%
  10. 10Santa CatarinaNuevo León
    0%
  11. 11Parque Industrial Ciudad MitrasNuevo León
    0%
  12. 12Mexico CityMexico City
    0%
  13. 13PueblaPuebla
    0%
  14. 14Silao de la VictoriaGuanajuato
    0%
  15. 15GuadalajaraJalisco
    0%
  16. 16MonterreyNuevo León
    0%
  17. 17Pachuca de SotoHidalgo
    0%
  18. 17SalamancaGuanajuato
    0%
  19. 19Ciudad ApodacaNuevo León
    0%
  20. 20TlaquepaqueJalisco
    0%
  21. 20León de los AldamaGuanajuato
    0%
  22. 22PesqueríaNuevo León
    0%
  23. 23San MarcosHidalgo
    0%
  24. 24Cadereyta JiménezNuevo León
    0%
  25. 25Ciudad Benito JuárezNuevo León
    0%
  26. 25CelayaGuanajuato
    0%
  27. 27ZapopanJalisco
    0%
  28. 28TulancingoHidalgo
    0%
  29. 29Zacatepec de HidalgoMorelos
    0%
  30. 30Heroica MatamorosTamaulipas
    0%
  31. 31San Juan del RíoQuerétaro
    0%
  32. 31San Luis de la PazGuanajuato
    0%
  33. 33Santiago de QuerétaroQuerétaro
    0%
  34. 34IrapuatoGuanajuato
    0%
  35. 35TehuacánPuebla
    0%
  36. 36TlaxcalaTlaxcala
    0%
  37. 37Tula de AllendeHidalgo
    0%
  38. 38GarcíaNuevo León
    0%
  39. 39La Providencia Siglo XXIHidalgo
    0%
  40. 40San Miguel de AllendeGuanajuato
    0%
  41. 41CuernavacaMorelos
    0%
  42. 42GuanajuatoGuanajuato
    0%
  43. 43AbasoloGuanajuato
    0%
  44. 44Ciudad JuárezChihuahua
    0%
  45. 45TepicNayarit
    0%
  46. 46NogalesSonora
    0%
  47. 47Victoria de DurangoDurango
    0%
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, July 2026 · Mexico now

Regions

Aguascalientes 1Baja California 2Chiapas 1Chihuahua 1Durango 1Guanajuato 9Hidalgo 6Jalisco 3México 2Mexico City 1Morelos 2Nayarit 1Nuevo León 9Puebla 2Querétaro 2San Luis Potosí 1Sonora 1Tamaulipas 1

Ranked cities in each region, July 2026.

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SmogRank, most polluted cities in Mexico, PM2.5, July 2026, smogrank.com/mx/history/2026-07 (accessed 6 Oct 2026).

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