SmogRank / World / Mexico / April 2026

Most polluted cities in Mexico, April 2026

48 cities in Mexico ranked by their average PM2.5 over the 30 days. Worst: Tuxtla at 33.1 µg/m³, #194 of 2,914 cities in the world. Cleanest: Nogales at 9.0. 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.

← Tuxtla 48% 40%0
Every city in Mexico ranked for April 2026, 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. 1TuxtlaChiapas
    48%
  2. 2San Luis PotosíSan Luis Potosí
    30%
  3. 3TlaquepaqueJalisco
    15%
  4. 4AguascalientesAguascalientes
    13%
  5. 5Victoria de DurangoDurango
    10%
  6. 6Zacatepec de HidalgoMorelos
    10%
  7. 7San Antonio la IslaMéxico
    7%
  8. 8Silao de la VictoriaGuanajuato
    4%
  9. 9Santa CatarinaNuevo León
    4%
  10. 10Pachuca de SotoHidalgo
    4%
  11. 11MonterreyNuevo León
    4%
  12. 12Ciudad JuárezChihuahua
    3%
  13. 13XonacatlánMéxico
    0%
  14. 14Hacienda Santa FeJalisco
    0%
  15. 15Ciudad NezahualcoyotlMéxico
    0%
  16. 16PueblaPuebla
    0%
  17. 17Atotonilco de TulaHidalgo
    0%
  18. 18CelayaGuanajuato
    0%
  19. 19Tetela del VolcánMorelos
    0%
  20. 20Mixquiahuala de JuárezHidalgo
    0%
  21. 21GuadalajaraJalisco
    0%
  22. 22Mexico CityMexico City
    0%
  23. 23TehuacánPuebla
    0%
  24. 24SalamancaGuanajuato
    0%
  25. 24Santiago de QuerétaroQuerétaro
    0%
  26. 24Ciudad Benito JuárezNuevo León
    0%
  27. 27Ciudad ApodacaNuevo León
    0%
  28. 28San MarcosHidalgo
    0%
  29. 28León de los AldamaGuanajuato
    0%
  30. 30CuernavacaMorelos
    0%
  31. 31MexicaliBaja California
    0%
  32. 32San Luis de la PazGuanajuato
    0%
  33. 33Cadereyta JiménezNuevo León
    0%
  34. 33ZapopanJalisco
    0%
  35. 35TlaxcalaTlaxcala
    0%
  36. 36TulancingoHidalgo
    0%
  37. 37Tula de AllendeHidalgo
    0%
  38. 38TijuanaBaja California
    0%
  39. 39PesqueríaNuevo León
    0%
  40. 40La Providencia Siglo XXIHidalgo
    0%
  41. 41GuanajuatoGuanajuato
    0%
  42. 42Santa AnitaJalisco
    0%
  43. 42AbasoloGuanajuato
    0%
  44. 44San Miguel de AllendeGuanajuato
    0%
  45. 45GarcíaNuevo León
    0%
  46. 46Heroica MatamorosTamaulipas
    0%
  47. 47La PazBaja California Sur
    0%
  48. 48NogalesSonora
    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, April 2026 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chiapas 1Chihuahua 1Durango 1Guanajuato 8Hidalgo 7Jalisco 5México 3Mexico City 1Morelos 3Nuevo León 7Puebla 2Querétaro 1San Luis Potosí 1Sonora 1Tamaulipas 1

Ranked cities in each region, April 2026.

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SmogRank, most polluted cities in Mexico, PM2.5, April 2026, smogrank.com/mx/history/2026-04 (accessed 7 Oct 2026).

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