SmogRank / World / Mexico / November 2023

Most people breathing unhealthy air in Mexico, November 2023

11 cities in Mexico measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day over the 30 days. The most people breathing unhealthy air: Guadalajara, Mexico, about 346K on an average day. A city needs measurements on 70% of the days to be ranked.

About 780K people in these 11 cities breathed unhealthy air on an average day of November 2023.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

← Guadalajara 346K 300K0
Every city in Mexico ranked for November 2023 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1GuadalajaraJalisco
    346K
  2. 2Victoria de DurangoDurango
    179K
  3. 3MexicaliBaja California
    103K
  4. 4MonterreyNuevo León
    75.7K
  5. 5Santa CatarinaNuevo León
    60.8K
  6. 6Ciudad General EscobedoNuevo León
    15.2K
  7. 7CelayaGuanajuato
    0
  8. 8Ciudad JuárezChihuahua
    0
  9. 9PueblaPuebla
    0
  10. 10León de los AldamaGuanajuato
    0
  11. 11Santiago de QuerétaroQuerétaro
    0
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, November 2023 · Mexico now

Regions

Baja California 2Chihuahua 1Coahuila 1Durango 1Guanajuato 7Hidalgo 4Jalisco 1México 3Morelos 2Nuevo León 8Puebla 2Querétaro 2Sonora 1

Ranked cities in each region, November 2023.

Use this board

SmogRank, most polluted cities in Mexico, by people breathing unhealthy air, PM2.5, November 2023, smogrank.com/mx/history/2023-11?by=people (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.