SmogRank / World / Mexico / February 2026

Most polluted cities in Mexico, February 2026

38 cities in Mexico ranked by their average PM2.5 over the 28 days. Worst: Aguascalientes at 35.9 µg/m³, #183 of 2,841 cities in the world. Cleanest: Mérida at 10.1. 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.

← Xonacatlán 56% 50%0
Every city in Mexico ranked for February 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. 1XonacatlánMéxico
    56%
  2. 2AguascalientesAguascalientes
    46%
  3. 3Zacatepec de HidalgoMorelos
    38%
  4. 4TijuanaBaja California
    35%
  5. 5Hacienda Santa FeJalisco
    27%
  6. 6TlaquepaqueJalisco
    21%
  7. 7MexicaliBaja California
    20%
  8. 8San Martin Texmelucan de LabastidaPuebla
    16%
  9. 9San Luis PotosíSan Luis Potosí
    14%
  10. 10Ciudad Benito JuárezNuevo León
    12%
  11. 11Naucalpan de JuárezMéxico
    8%
  12. 12PueblaPuebla
    7%
  13. 13GuadalajaraJalisco
    7%
  14. 14Ciudad JuárezChihuahua
    7%
  15. 15SaltilloCoahuila
    5%
  16. 16Heroica MatamorosTamaulipas
    4%
  17. 17San MarcosHidalgo
    4%
  18. 18Cadereyta JiménezNuevo León
    4%
  19. 19PesqueríaNuevo León
    4%
  20. 20TlaxcalaTlaxcala
    4%
  21. 21Mexico CityMexico City
    4%
  22. 22Ciudad ApodacaNuevo León
    4%
  23. 23TehuacánPuebla
    0%
  24. 24Pachuca de SotoHidalgo
    0%
  25. 25Santiago de QuerétaroQuerétaro
    0%
  26. 26CuernavacaMorelos
    0%
  27. 27Santa AnitaJalisco
    0%
  28. 28Santa CatarinaNuevo León
    0%
  29. 29La Providencia Siglo XXIHidalgo
    0%
  30. 30San Juan del RíoQuerétaro
    0%
  31. 31Ciudad General EscobedoNuevo León
    0%
  32. 32TulancingoHidalgo
    0%
  33. 32MonterreyNuevo León
    0%
  34. 34ZapopanJalisco
    0%
  35. 35NogalesSonora
    0%
  36. 36GarcíaNuevo León
    0%
  37. 37La PazBaja California Sur
    0%
  38. 38MéridaYucatán
    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, February 2026 · Mexico now

Regions

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

Ranked cities in each region, February 2026.

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SmogRank, most polluted cities in Mexico, PM2.5, February 2026, smogrank.com/mx/history/2026-02 (accessed 7 Oct 2026).

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