SmogRank / World / Mexico / March 2024

Most unhealthy days in Mexico, March 2024

12 cities in Mexico ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Ciudad Juárez, Mexico, 3 of 30 measured days. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Ciudad Juárez 10% 7.5%0
Every city in Mexico ranked for March 2024, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Ciudad JuárezChihuahua
    3 of 30
  2. 2SalamancaGuanajuato
    2 of 29
  3. 3CelayaGuanajuato
    2 of 31
  4. 4Silao de la VictoriaGuanajuato
    0 of 24
  5. 5San Luis de la PazGuanajuato
    0 of 23
  6. 6IrapuatoGuanajuato
    0 of 30
  7. 7León de los AldamaGuanajuato
    0 of 31
  8. 8San Miguel de AllendeGuanajuato
    0 of 30
  9. 9GuanajuatoGuanajuato
    0 of 27
  10. 10AbasoloGuanajuato
    0 of 30
  11. 11Heroica MatamorosTamaulipas
    0 of 29
  12. 12NogalesSonora
    0 of 30
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, March 2024 · Mexico now

Regions

Chihuahua 1Guanajuato 9Sonora 1Tamaulipas 1

Ranked cities in each region, March 2024.

Use this board

SmogRank, most polluted cities in Mexico, by unhealthy days, PM2.5, March 2024, smogrank.com/mx/history/2024-03?by=days (accessed 7 Oct 2026).

Download top 10 by average (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.