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 21 Nov 2023: Victoria de Durango 32.0 µg/m³, Guadalajara 30.2 µg/m³ and Toluca 28.4 µg/m³.
- 1Victoria de DurangoDurango32.0
- 2GuadalajaraJalisco30.2
- 3TolucaMéxico28.4
- 4MexicaliBaja California28.3
- 5CholulaPuebla27.7
- 6San Francisco TlalcilalcalpanMéxico27.0
- 7Santiaguito TlalcilalcalliMéxico27.0
- 8TijuanaBaja California27.0
- 9San Antonio la IslaMéxico26.1
- 10Ciudad Benito JuárezNuevo León26.1
- 11San Salvador TizatlalliMéxico26.1
- 12SalamancaGuanajuato22.2
- 13Santa CatarinaNuevo León21.1
- 14CelayaGuanajuato18.9
- 15MonterreyNuevo León17.7
- 16Ciudad General EscobedoNuevo León16.8
- 17PueblaPuebla15.1
- 18Tepeji del Río de OcampoHidalgo15.0
- 19SaltilloCoahuila14.9
- 20Cadereyta JiménezNuevo León14.8
+ 15 more cities, 14.4 µg/m³ and below
Not counted on this day, too few days measured: Silao de la Victoria since 18 Nov 2023, Morelia since 25 Oct 2023, San Andrés Tuxtla since 24 Oct 2023 and 13 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.