SmogRank / World / Mexico / May 2025

Most people breathing unhealthy air in Mexico, May 2025

17 cities in Mexico measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day over the 31 days. The most people breathing unhealthy air: Victoria de Durango, Mexico, about 140K on an average day. A city needs measurements on 70% of the days to be ranked.

About 624K people in these 17 cities breathed unhealthy air on an average day of May 2025.

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.

← Victoria de Durango 140K 100K0
Every city in Mexico ranked for May 2025 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. 1Victoria de DurangoDurango
    140K
  2. 2MonterreyNuevo León
    110K
  3. 3Ciudad JuárezChihuahua
    97.6K
  4. 4AguascalientesAguascalientes
    93.2K
  5. 5León de los AldamaGuanajuato
    65.8K
  6. 6TlaquepaqueJalisco
    62.9K
  7. 7PueblaPuebla
    54.6K
  8. 8Ciudad NezahualcoyotlMéxico
    0
  9. 9Mexico CityMexico City
    0
  10. 10GuadalajaraJalisco
    0
  11. 11Santiago de QuerétaroQuerétaro
    0
  12. 12TepicNayarit
    0
  13. 13Ciudad General EscobedoNuevo León
    0
  14. 14CelayaGuanajuato
    0
  15. 15Pachuca de SotoHidalgo
    0
  16. 16ZapopanJalisco
    0
  17. 17MexicaliBaja California
    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, May 2025 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chihuahua 2Durango 1Guanajuato 6Hidalgo 8Jalisco 5México 2Mexico City 1Morelos 1Nayarit 1Nuevo León 4Puebla 4Querétaro 2San Luis Potosí 1Sonora 1Tamaulipas 1Yucatán 1

Ranked cities in each region, May 2025.

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SmogRank, most polluted cities in Mexico, by people breathing unhealthy air, PM2.5, May 2025, smogrank.com/mx/history/2025-05?by=people (accessed 7 Oct 2026).

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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.