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 14 Apr 2025: Victoria de Durango 39.3 µg/m³, Cholula 37.6 µg/m³ and Tlaquepaque 35.0 µg/m³.
- 1Victoria de DurangoDurango39.3
- 2CholulaPuebla37.6
- 3TlaquepaqueJalisco35.0
- 4Hacienda Santa FeJalisco31.6
- 5GuadalajaraJalisco29.3
- 6Ciudad JuárezChihuahua28.8
- 7San Luis de la PazGuanajuato28.1
- 8Ciudad NezahualcoyotlMéxico27.1
- 9Cadereyta JiménezNuevo León26.1
- 10IrapuatoGuanajuato25.1
- 11Mixquiahuala de JuárezHidalgo23.6
- 12Jardines de la SillaNuevo León23.4
- 13Ciudad Benito JuárezNuevo León23.1
- 14TehuacánPuebla22.5
- 15Atotonilco de TulaHidalgo22.5
- 16Zacatepec de HidalgoMorelos22.1
- 17MonterreyNuevo León22.1
- 18Naucalpan de JuárezMéxico21.9
- 19CuernavacaMorelos21.8
- 20Mexico CityMexico City21.8
+ 25 more cities, 20.9 µg/m³ and below
Not counted on this day, too few days measured: Xonacatlán since 13 Apr 2025, Apizaco since 12 Apr 2025, Toluca since 11 Apr 2025 and 5 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.