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.
The worst cities in Mexico for PM2.5 over the 30 days to 13 Jun 2025: Cholula 32.3 µg/m³, Hacienda Santa Fe 31.2 µg/m³ and Victoria de Durango 28.9 µg/m³.
- 1CholulaPuebla32.3
- 2Hacienda Santa FeJalisco31.2
- 3Victoria de DurangoDurango28.9
- 4TlaquepaqueJalisco27.8
- 5Atotonilco de TulaHidalgo26.0
- 6Ciudad Benito JuárezNuevo León26.0
- 7Naucalpan de JuárezMéxico25.0
- 8AguascalientesAguascalientes24.0
- 9Tepeji del Río de OcampoHidalgo23.7
- 10ApizacoTlaxcala23.7
- 11MonterreyNuevo León23.2
- 12Santa CatarinaNuevo León22.9
- 13Mixquiahuala de JuárezHidalgo21.2
- 14Ciudad NezahualcoyotlMéxico21.0
- 15TlaxcoapanHidalgo20.7
- 16TehuacánPuebla20.6
- 17GuadalajaraJalisco20.3
- 18Mexico CityMexico City20.0
- 19Ciudad General EscobedoNuevo León19.9
- 20TulancingoHidalgo19.7
+ 22 more cities, 18.6 µg/m³ and below
Not counted on this day, too few days measured: San Miguel de Allende since 12 Jun 2025, Celaya since 12 Jun 2025, Cadereyta Jiménez since 11 Jun 2025 and 12 more cities.
Cities counted each 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.