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 12 Apr 2026: Victoria de Durango 30.4 µg/m³, Xonacatlán 29.4 µg/m³ and Tuxtla 28.7 µg/m³.
- 1Victoria de DurangoDurango30.4
- 2XonacatlánMéxico29.4
- 3TuxtlaChiapas28.7
- 4AguascalientesAguascalientes27.6
- 5San Antonio la IslaMéxico26.7
- 6San Salvador TizatlalliMéxico26.7
- 7TlaquepaqueJalisco26.2
- 8Hacienda Santa FeJalisco24.7
- 9MexicaliBaja California22.6
- 10PueblaPuebla20.8
- 11Zacatepec de HidalgoMorelos20.7
- 12Atotonilco de TulaHidalgo20.4
- 13Ciudad NezahualcoyotlMéxico19.7
- 14TijuanaBaja California19.6
- 15CelayaGuanajuato19.1
- 16YecapixtlaMorelos18.7
- 17Tetela del VolcánMorelos18.7
- 18Mixquiahuala de JuárezHidalgo18.5
- 19GuadalajaraJalisco18.3
- 20Pachuca de SotoHidalgo18.2
+ 32 more cities, 17.9 µg/m³ and below
Not counted on this day, too few days measured: San Francisco Tlalcilalcalpan since 12 Apr 2026, Santiaguito Tlalcilalcalli since 12 Apr 2026, Naucalpan de Juárez since 31 Mar 2026 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.