SmogRank / World / Mexico / September 2023

Most unhealthy days in Mexico, September 2023

39 cities in Mexico ranked by their share of unhealthy days over the 30 days. The most unhealthy days: Tlaquepaque, Mexico, 4 of 26 measured days. 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.

← Tlaquepaque 15% 10%0
Every city in Mexico ranked for September 2023, 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. 1TlaquepaqueJalisco
    4 of 26
  2. 2ZapopanJalisco
    3 of 28
  3. 3San Antonio la IslaMéxico
    2 of 24
  4. 4SaltilloCoahuila
    2 of 26
  5. 5Santiaguito TlalcilalcalliMéxico
    1 of 25
  6. 6Ciudad NezahualcoyotlMéxico
    1 of 25
  7. 7XonacatlánMéxico
    1 of 30
  8. 8MexicaliBaja California
    1 of 30
  9. 9TolucaMéxico
    1 of 30
  10. 10CuernavacaMorelos
    1 of 30
  11. 11NogalesSonora
    1 of 30
  12. 12GuadalajaraJalisco
    0 of 26
  13. 13TijuanaBaja California
    0 of 30
  14. 14Ciudad ApodacaNuevo León
    0 of 25
  15. 15Ciudad JuárezChihuahua
    0 of 30
  16. 16Naucalpan de JuárezMéxico
    0 of 25
  17. 17Santa CatarinaNuevo León
    0 of 26
  18. 18SalamancaGuanajuato
    0 of 27
  19. 19CelayaGuanajuato
    0 of 30
  20. 20PueblaPuebla
    0 of 30
  21. 21Mexico CityMexico City
    0 of 26
  22. 22Ciudad Benito JuárezNuevo León
    0 of 27
  23. 23TlaxcoapanHidalgo
    0 of 26
  24. 23Jardines de la SillaNuevo León
    0 of 27
  25. 25MonterreyNuevo León
    0 of 30
  26. 26San MarcosHidalgo
    0 of 27
  27. 27León de los AldamaGuanajuato
    0 of 26
  28. 27Ciudad General EscobedoNuevo León
    0 of 23
  29. 29San Luis de la PazGuanajuato
    0 of 30
  30. 30San Andrés TuxtlaVeracruz
    0 of 30
  31. 31Santiago de QuerétaroQuerétaro
    0 of 28
  32. 32Cadereyta JiménezNuevo León
    0 of 27
  33. 33San Miguel de AllendeGuanajuato
    0 of 23
  34. 34AbasoloGuanajuato
    0 of 30
  35. 35GuanajuatoGuanajuato
    0 of 21
  36. 36TlaxcalaTlaxcala
    0 of 26
  37. 37Pachuca de SotoHidalgo
    0 of 30
  38. 38GarcíaNuevo León
    0 of 23
  39. 39San Juan del RíoQuerétaro
    0 of 24
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, September 2023 · Mexico now

Regions

Baja California 2Chihuahua 1Coahuila 1Guanajuato 7Hidalgo 3Jalisco 3México 6Mexico City 1Morelos 1Nuevo León 8Puebla 1Querétaro 2Sonora 1

Ranked cities in each region, September 2023.

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SmogRank, most polluted cities in Mexico, by unhealthy days, PM2.5, September 2023, smogrank.com/mx/history/2023-09?by=days (accessed 7 Oct 2026).

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