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 to21 Dec 2023 That day's board

The worst cities in Mexico for PM2.5 over the 30 days to 21 Dec 2023: Tlaquepaque 48.0 µg/m³, Victoria de Durango 41.4 µg/m³ and Ciudad Benito Juárez 39.5 µg/m³.

  1. 1TlaquepaqueJalisco48.0
  2. 2Victoria de DurangoDurango41.4
  3. 3Ciudad Benito JuárezNuevo León39.5
  4. 4ZapopanJalisco30.1
  5. 5Santa CatarinaNuevo León28.9
  6. 6TijuanaBaja California28.0
  7. 7CholulaPuebla27.9
  8. 8VeracruzVeracruz27.8
  9. 9MexicaliBaja California27.1
  10. 10TolucaMéxico25.7
  11. 11San Francisco TlalcilalcalpanMéxico25.6
  12. 12Santiaguito TlalcilalcalliMéxico25.6
  13. 13GuadalajaraJalisco25.5
  14. 14San Antonio la IslaMéxico25.1
  15. 15San Salvador TizatlalliMéxico25.1
  16. 16Ciudad ApodacaNuevo León24.2
  17. 17MonterreyNuevo León23.8
  18. 18Ciudad General EscobedoNuevo León22.6
  19. 19Ciudad JuárezChihuahua20.5
  20. 20SaltilloCoahuila19.9

+ 26 more cities, 19.2 µg/m³ and below

Not counted on this day, too few days measured: Yecapixtla since 11 Dec 2023, Tetela del Volcán since 11 Dec 2023, Salamanca since 5 Dec 2023 and Jardines de la Silla since 4 Dec 2023.

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 readers for them. Most cities there are missing from this board, not clean. Why.