SmogRank / World / Mexico / December 2023

Most unhealthy days in Mexico, December 2023

41 cities in Mexico ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Ciudad Benito Juárez, Mexico, 21 of 31 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.

← Ciudad Benito Juárez 68% 60%0
Every city in Mexico ranked for December 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. 1Ciudad Benito JuárezNuevo León
    21 of 31
  2. 2TlaquepaqueJalisco
    16 of 25
  3. 3Victoria de DurangoDurango
    19 of 30
  4. 4TijuanaBaja California
    16 of 31
  5. 5CholulaPuebla
    12 of 29
  6. 6Santa CatarinaNuevo León
    8 of 31
  7. 7ZapopanJalisco
    6 of 27
  8. 8San Antonio la IslaMéxico
    6 of 27
  9. 9SaltilloCoahuila
    5 of 23
  10. 10MexicaliBaja California
    6 of 31
  11. 11GuadalajaraJalisco
    5 of 28
  12. 12TolucaMéxico
    5 of 31
  13. 13Santiaguito TlalcilalcalliMéxico
    4 of 27
  14. 14Ciudad General EscobedoNuevo León
    4 of 31
  15. 15VeracruzVeracruz
    3 of 28
  16. 16Ciudad ApodacaNuevo León
    3 of 29
  17. 17NogalesSonora
    3 of 30
  18. 18MonterreyNuevo León
    3 of 31
  19. 19Cadereyta JiménezNuevo León
    2 of 30
  20. 20San Martin Texmelucan de LabastidaPuebla
    1 of 22
  21. 21IrapuatoGuanajuato
    1 of 29
  22. 22León de los AldamaGuanajuato
    1 of 30
  23. 23CelayaGuanajuato
    1 of 31
  24. 24Silao de la VictoriaGuanajuato
    1 of 31
  25. 25Santiago de QuerétaroQuerétaro
    1 of 31
  26. 26Ciudad JuárezChihuahua
    0 of 31
  27. 27Atotonilco de TulaHidalgo
    0 of 29
  28. 28PueblaPuebla
    0 of 31
  29. 29Tepeji del Río de OcampoHidalgo
    0 of 26
  30. 30CuernavacaMorelos
    0 of 28
  31. 31Mixquiahuala de JuárezHidalgo
    0 of 31
  32. 32TlaxcoapanHidalgo
    0 of 29
  33. 33San Andrés TuxtlaVeracruz
    0 of 28
  34. 34San MarcosHidalgo
    0 of 28
  35. 35AbasoloGuanajuato
    0 of 28
  36. 36TehuacánPuebla
    0 of 31
  37. 37ZacapoaxtlaPuebla
    0 of 28
  38. 38San Luis de la PazGuanajuato
    0 of 29
  39. 39San Miguel de AllendeGuanajuato
    0 of 28
  40. 40GuanajuatoGuanajuato
    0 of 31
  41. 41San Juan del RíoQuerétaro
    0 of 28
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, December 2023 · Mexico now

Regions

Baja California 2Chihuahua 1Coahuila 1Durango 1Guanajuato 8Hidalgo 5Jalisco 3México 3Morelos 1Nuevo León 6Puebla 5Querétaro 2Sonora 1

Ranked cities in each region, December 2023.

Use this board

SmogRank, most polluted cities in Mexico, by unhealthy days, PM2.5, December 2023, smogrank.com/mx/history/2023-12?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.