SmogRank / World / Mexico / April 2026

Most polluted cities in Mexico, April 2026

48 cities in Mexico ranked by their average PM2.5 over the 30 days. Worst: Tuxtla at 33.1 µg/m³, #194 of 2,914 cities in the world. Cleanest: Nogales at 9.0. A city needs measurements on 70% of the days to be ranked.

About 363K people in these 16 cities breathed unhealthy air on an average day of April 2026.

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.

← Tlaquepaque 96.3K 90K0
Every city in Mexico ranked for April 2026 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. 1TlaquepaqueJalisco
    96.3K
  2. 2AguascalientesAguascalientes
    96.3K
  3. 3Victoria de DurangoDurango
    53.7K
  4. 4Ciudad JuárezChihuahua
    50.4K
  5. 5MonterreyNuevo León
    43.7K
  6. 6Santa CatarinaNuevo León
    12.2K
  7. 7Pachuca de SotoHidalgo
    10.3K
  8. 8Ciudad NezahualcoyotlMéxico
    0
  9. 9PueblaPuebla
    0
  10. 10CelayaGuanajuato
    0
  11. 11GuadalajaraJalisco
    0
  12. 12Mexico CityMexico City
    0
  13. 13Santiago de QuerétaroQuerétaro
    0
  14. 14León de los AldamaGuanajuato
    0
  15. 15MexicaliBaja California
    0
  16. 16ZapopanJalisco
    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, April 2026 · Mexico now

Regions

Aguascalientes 1Baja California 2Baja California Sur 1Chiapas 1Chihuahua 1Durango 1Guanajuato 8Hidalgo 7Jalisco 5México 3Mexico City 1Morelos 3Nuevo León 7Puebla 2Querétaro 1San Luis Potosí 1Sonora 1Tamaulipas 1

Ranked cities in each region, April 2026.

Use this board

SmogRank, most polluted cities in Mexico, PM2.5, April 2026, smogrank.com/mx/history/2026-04 (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.