SmogRank / Countries / Mexico / January 2025

Most polluted cities in Mexico, January 2025

11 cities in Mexico ranked by their average PM2.5 over the 31 days. Worst: Ciudad Nezahualcoyotl at 26.5 µg/m³, #78 of 1,937 cities in the world. Cleanest: San Miguel de Allende at 13.1. A city needs measurements on 70% of the days to be ranked.

  1. 1Ciudad NezahualcoyotlMéxico
    26.5
  2. 2Silao de la VictoriaGuanajuato
    23.6
  3. 3IrapuatoGuanajuato
    22.5
  4. 4Mexico CityMexico City
    21.9
  5. 5TijuanaBaja California
    21.1
  6. 6San Luis de la PazGuanajuato
    19.6
  7. 7CelayaGuanajuato
    16.4
  8. 8SalamancaGuanajuato
    15.2
  9. 9AbasoloGuanajuato
    13.9
  10. 10GuanajuatoGuanajuato
    13.4
  11. 11San Miguel de AllendeGuanajuato
    13.1
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, January 2025 · Mexico now