SmogRank / History / City race

Cities in Mexico, worst air first, day by day

Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.

CountriesCities
The 30 days to17 Apr 2025 That day's board

The worst cities in Mexico for PM2.5 over the 30 days to 17 Apr 2025: Victoria de Durango 39.3 µg/m³, Cholula 38.2 µg/m³ and Tlaquepaque 34.5 µg/m³.

  1. 1Victoria de DurangoDurango39.3
  2. 2CholulaPuebla38.2
  3. 3TlaquepaqueJalisco34.5
  4. 4Hacienda Santa FeJalisco31.3
  5. 5SaltilloCoahuila27.3
  6. 6San Luis de la PazGuanajuato27.2
  7. 7Ciudad NezahualcoyotlMéxico26.7
  8. 8GuadalajaraJalisco26.7
  9. 9Ciudad JuárezChihuahua25.5
  10. 10IrapuatoGuanajuato24.6
  11. 11CuernavacaMorelos23.8
  12. 12Zacatepec de HidalgoMorelos23.6
  13. 13Mixquiahuala de JuárezHidalgo23.3
  14. 14TehuacánPuebla22.9
  15. 15Atotonilco de TulaHidalgo22.8
  16. 16Jardines de la SillaNuevo León22.7
  17. 17Ciudad Benito JuárezNuevo León22.3
  18. 18Mexico CityMexico City21.9
  19. 19MonterreyNuevo León21.9
  20. 20Naucalpan de JuárezMéxico21.8

+ 27 more cities, the next at 21.2 µg/m³

Not counted on this day, too few days measured: Cadereyta Jiménez since 17 Apr 2025, Xonacatlán since 13 Apr 2025, Apizaco since 12 Apr 2025 and 5 more cities.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that day

A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.

Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.