SmogRank / World / Mexico / July 2025

Most unhealthy days in Mexico, July 2025

43 cities in Mexico ranked by their share of unhealthy days over the 31 days. The most unhealthy days: La Providencia Siglo XXI, Mexico, 5 of 27 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.

← La Providencia Siglo XXI 19% 15%0
Every city in Mexico ranked for July 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. 1La Providencia Siglo XXIHidalgo
    5 of 27
  2. 2MéridaYucatán
    2 of 22
  3. 3Atotonilco de TulaHidalgo
    2 of 27
  4. 4Santiaguito TlalcilalcalliMéxico
    2 of 28
  5. 5SaltilloCoahuila
    2 of 28
  6. 6San Antonio la IslaMéxico
    1 of 31
  7. 7Ciudad Benito JuárezNuevo León
    1 of 31
  8. 8AguascalientesAguascalientes
    1 of 31
  9. 9XonacatlánMéxico
    0 of 30
  10. 10TuxtlaChiapas
    0 of 30
  11. 11GarcíaNuevo León
    0 of 24
  12. 12Tepeji del Río de OcampoHidalgo
    0 of 30
  13. 13Santa CatarinaNuevo León
    0 of 29
  14. 14CelayaGuanajuato
    0 of 22
  15. 15MonterreyNuevo León
    0 of 31
  16. 15León de los AldamaGuanajuato
    0 of 25
  17. 17Mexico CityMexico City
    0 of 26
  18. 18PueblaPuebla
    0 of 31
  19. 19San Martin Texmelucan de LabastidaPuebla
    0 of 31
  20. 20TehuacánPuebla
    0 of 26
  21. 21Mixquiahuala de JuárezHidalgo
    0 of 31
  22. 22TlaquepaqueJalisco
    0 of 28
  23. 23TulancingoHidalgo
    0 of 31
  24. 24MexicaliBaja California
    0 of 31
  25. 25San MarcosHidalgo
    0 of 29
  26. 26Santiago de QuerétaroQuerétaro
    0 of 31
  27. 27TlaxcalaTlaxcala
    0 of 23
  28. 28Ciudad JuárezChihuahua
    0 of 31
  29. 29San Juan del RíoQuerétaro
    0 of 30
  30. 30San Luis PotosíSan Luis Potosí
    0 of 23
  31. 31TijuanaBaja California
    0 of 31
  32. 31San Miguel de AllendeGuanajuato
    0 of 24
  33. 33Silao de la VictoriaGuanajuato
    0 of 26
  34. 34Heroica MatamorosTamaulipas
    0 of 28
  35. 35HuichapanHidalgo
    0 of 27
  36. 35AbasoloGuanajuato
    0 of 26
  37. 37NogalesSonora
    0 of 31
  38. 38TepicNayarit
    0 of 31
  39. 39Pachuca de SotoHidalgo
    0 of 29
  40. 40ZapopanJalisco
    0 of 29
  41. 41La PazBaja California Sur
    0 of 30
  42. 42ChihuahuaChihuahua
    0 of 29
  43. 43Zacatepec de HidalgoMorelos
    0 of 23
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 2025 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chiapas 1Chihuahua 2Coahuila 1Guanajuato 5Hidalgo 8Jalisco 2México 3Mexico City 1Morelos 1Nayarit 1Nuevo León 4Puebla 3Querétaro 2San Luis Potosí 1Sonora 1Tamaulipas 1Yucatán 1

Ranked cities in each region, July 2025.

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SmogRank, most polluted cities in Mexico, by unhealthy days, PM2.5, July 2025, smogrank.com/mx/history/2025-07?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.