SmogRank / World / Mexico / November 2025

Most unhealthy days in Mexico, November 2025

44 cities in Mexico ranked by their share of unhealthy days over the 30 days. The most unhealthy days: Cholula, Mexico, 17 of 21 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.

← Cholula 81% 80%0
Every city in Mexico ranked for November 2025, 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. 1CholulaPuebla
    17 of 21
  2. 2Hacienda Santa FeJalisco
    22 of 30
  3. 3GuadalajaraJalisco
    14 of 27
  4. 4TlaquepaqueJalisco
    13 of 30
  5. 5San Antonio la IslaMéxico
    12 of 30
  6. 6XonacatlánMéxico
    10 of 28
  7. 7TijuanaBaja California
    9 of 30
  8. 8Santiaguito TlalcilalcalliMéxico
    6 of 21
  9. 9AguascalientesAguascalientes
    7 of 28
  10. 10Ciudad General EscobedoNuevo León
    5 of 24
  11. 11Ciudad NezahualcoyotlMéxico
    6 of 30
  12. 12Ciudad Benito JuárezNuevo León
    5 of 28
  13. 13MexicaliBaja California
    5 of 30
  14. 14Santa CatarinaNuevo León
    3 of 28
  15. 15GarcíaNuevo León
    2 of 21
  16. 16Santa AnitaJalisco
    2 of 24
  17. 17Zacatepec de HidalgoMorelos
    2 of 30
  18. 18San Miguel de AllendeGuanajuato
    1 of 22
  19. 19TuxtlaChiapas
    1 of 25
  20. 20Mixquiahuala de JuárezHidalgo
    1 of 28
  21. 21PueblaPuebla
    1 of 30
  22. 22Naucalpan de JuárezMéxico
    1 of 30
  23. 23Ciudad JuárezChihuahua
    1 of 30
  24. 24Mexico CityMexico City
    0 of 30
  25. 25SalamancaGuanajuato
    0 of 23
  26. 26ZapopanJalisco
    0 of 28
  27. 27NogalesSonora
    0 of 23
  28. 28PesqueríaNuevo León
    0 of 29
  29. 28CelayaGuanajuato
    0 of 23
  30. 30León de los AldamaGuanajuato
    0 of 23
  31. 31San Martin Texmelucan de LabastidaPuebla
    0 of 21
  32. 32Cadereyta JiménezNuevo León
    0 of 28
  33. 33MonterreyNuevo León
    0 of 30
  34. 34TepicNayarit
    0 of 30
  35. 34Santiago de QuerétaroQuerétaro
    0 of 29
  36. 36San MarcosHidalgo
    0 of 21
  37. 37Tetela del VolcánMorelos
    0 of 25
  38. 38TulancingoHidalgo
    0 of 30
  39. 39San Juan del RíoQuerétaro
    0 of 30
  40. 40La PazBaja California Sur
    0 of 25
  41. 41Pachuca de SotoHidalgo
    0 of 30
  42. 42MéridaYucatán
    0 of 23
  43. 43Heroica MatamorosTamaulipas
    0 of 21
  44. 44Victoria de DurangoDurango
    0 of 29
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, November 2025 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chiapas 1Chihuahua 1Durango 1Guanajuato 4Hidalgo 4Jalisco 5México 5Mexico City 1Morelos 2Nayarit 1Nuevo León 7Puebla 3Querétaro 2Sonora 1Tamaulipas 1Yucatán 1

Ranked cities in each region, November 2025.

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SmogRank, most polluted cities in Mexico, by unhealthy days, PM2.5, November 2025, smogrank.com/mx/history/2025-11?by=days (accessed 7 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.