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 9 Jun 2025: Hacienda Santa Fe 32.5 µg/m³, Cholula 32.0 µg/m³ and Victoria de Durango 27.4 µg/m³.
- 1Hacienda Santa FeJalisco32.5
- 2CholulaPuebla32.0
- 3Victoria de DurangoDurango27.4
- 4TlaquepaqueJalisco27.2
- 5Ciudad Benito JuárezNuevo León26.8
- 6Atotonilco de TulaHidalgo25.1
- 7AguascalientesAguascalientes24.5
- 8Naucalpan de JuárezMéxico24.0
- 9MonterreyNuevo León23.5
- 10ApizacoTlaxcala23.4
- 11Santa CatarinaNuevo León23.1
- 12Cadereyta JiménezNuevo León23.0
- 13Tepeji del Río de OcampoHidalgo22.8
- 14Ciudad JuárezChihuahua22.7
- 15Mixquiahuala de JuárezHidalgo21.6
- 16GuadalajaraJalisco21.3
- 17Ciudad NezahualcoyotlMéxico21.1
- 18MoreliaMichoacán20.8
- 19Ciudad General EscobedoNuevo León20.5
- 20TehuacánPuebla20.3
+ 26 more cities, 20.3 µg/m³ and below
Not counted on this day, too few days measured: Salamanca since 8 Jun 2025, Abasolo since 6 Jun 2025, Atlixco since 30 May 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.