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 16 Jan 2024: Tlaquepaque 61.1 µg/m³, Ciudad Benito Juárez 51.3 µg/m³ and Tijuana 36.9 µg/m³.
- 1TlaquepaqueJalisco61.1
- 2Ciudad Benito JuárezNuevo León51.3
- 3TijuanaBaja California36.9
- 4CholulaPuebla36.5
- 5San Francisco TlalcilalcalpanMéxico33.5
- 6Santiaguito TlalcilalcalliMéxico33.5
- 7GuadalajaraJalisco32.9
- 8MexicaliBaja California32.1
- 9ZapopanJalisco31.3
- 10Ciudad ApodacaNuevo León30.1
- 11TolucaMéxico29.2
- 12Santa CatarinaNuevo León28.7
- 13CelayaGuanajuato28.6
- 14Ciudad General EscobedoNuevo León27.8
- 15Zacatepec de HidalgoMorelos27.0
- 16San Antonio la IslaMéxico26.7
- 17San Salvador TizatlalliMéxico26.7
- 18MonterreyNuevo León25.6
- 19Cadereyta JiménezNuevo León25.0
- 20VeracruzVeracruz24.0
+ 23 more cities, 23.2 µg/m³ and below
Not counted on this day, too few days measured: Minatitlán since 14 Jan 2024, Victoria de Durango since 10 Jan 2024, Cuernavaca since 7 Jan 2024 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.