SmogRank / World / Mexico / 2025

Most polluted cities in Mexico, 2025

28 cities in Mexico ranked by their average PM2.5 over the 365 days; 28 above the WHO annual guideline (5.0 µg/m³). Worst: Tlaquepaque at 26.3 µg/m³, #190 of 2,624 cities in the world. Cleanest: Heroica Matamoros at 9.7. 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 18% 15%0
Every city in Mexico ranked for 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. 1TlaquepaqueJalisco
    18%
  2. 2AguascalientesAguascalientes
    12%
  3. 3MexicaliBaja California
    12%
  4. 4TijuanaBaja California
    12%
  5. 5Ciudad Benito JuárezNuevo León
    8%
  6. 6Santa CatarinaNuevo León
    5%
  7. 7Ciudad JuárezChihuahua
    5%
  8. 8MonterreyNuevo León
    4%
  9. 9Zacatepec de HidalgoMorelos
    3%
  10. 10TehuacánPuebla
    3%
  11. 11IrapuatoGuanajuato
    3%
  12. 12Mixquiahuala de JuárezHidalgo
    3%
  13. 13Naucalpan de JuárezMéxico
    3%
  14. 14NogalesSonora
    3%
  15. 15Mexico CityMexico City
    1%
  16. 16TulancingoHidalgo
    1%
  17. 17León de los AldamaGuanajuato
    1%
  18. 18ZapopanJalisco
    1%
  19. 19PueblaPuebla
    1%
  20. 20Heroica MatamorosTamaulipas
    1%
  21. 21Pachuca de SotoHidalgo
    0%
  22. 22San Miguel de AllendeGuanajuato
    0%
  23. 23San Juan del RíoQuerétaro
    0%
  24. 24CelayaGuanajuato
    0%
  25. 25SalamancaGuanajuato
    0%
  26. 26TepicNayarit
    0%
  27. 27Santiago de QuerétaroQuerétaro
    0%
  28. 28AbasoloGuanajuato
    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, 2025 · Mexico now

Regions

Aguascalientes 1Baja California 2Chihuahua 1Guanajuato 6Hidalgo 3Jalisco 2México 1Mexico City 1Morelos 1Nayarit 1Nuevo León 3Puebla 2Querétaro 2Sonora 1Tamaulipas 1

Ranked cities in each region, 2025.

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SmogRank, most polluted cities in Mexico, PM2.5, 2025, smogrank.com/mx/history/2025 (accessed 6 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.