SmogRank / World / North America / Mexico / Nuevo León

Most polluted cities in Nuevo León, Mexico

9 measured cities, this year; 9 above the WHO annual guideline. Worst: Santa Catarina at 17.3 µg/m³, #447 in the world.

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.

Jalisco: 5 measured citiesNuevo León: 9 measured citiesSan Luis Potosí: 1 measured cityTamaulipas: 1 measured cityVeracruzZacatecasCoahuila#9 García: 11.1 µg/m³#8 Pesquería: 13.5 µg/m³#7 Cadereyta Jiménez: 14.4 µg/m³#5 Monterrey: 15.5 µg/m³#6 Ciudad Apodaca: 15.5 µg/m³#4 Ciudad Benito Juárez: 16.5 µg/m³#3 Parque Industrial Ciudad Mitras: 16.8 µg/m³#1 Santa Catarina: 17.3 µg/m³#2 Ciudad General Escobedo: 17.3 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Ciudad Benito Juárez 4% 4%0
Every measured city in Nuevo León, Mexico, 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 Benito Juárez 4%
  2. 2Cadereyta Jiménez 1%
  3. 3Santa Catarina 1%
  4. 4Pesquería 1%
  5. 5Ciudad General Escobedo 1%
  6. 6Ciudad Apodacalast full day 3 Oct 1%
  7. 7Monterrey 0%
  8. 8Parque Industrial Ciudad Mitras 0%
  9. 9Garcíalast full day 2 Oct 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

Estimated: cities without a monitor

Nuevo León cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Guadalupe≈ 9 µg/m³Good
San Nicolás de los Garza≈ 9 µg/m³Good
San Pedro Garza García≈ 9 µg/m³Good
Linares≈ 7 µg/m³Good
Cadereyta≈ 12 µg/m³Moderate
Montemorelos≈ 7 µg/m³Good
Jardines de la Silla≈ 12 µg/m³Moderate
Santiago≈ 12 µg/m³Moderate
Fraccionamiento Real Palmas≈ 10 µg/m³Moderate
Ciudad Sabinas Hidalgo≈ 8 µg/m³Good
Ciudad de Allende≈ 7 µg/m³Good
Mitras Poniente≈ 9 µg/m³Good
Anáhuac≈ 8 µg/m³Good
Hidalgo≈ 12 µg/m³Moderate
Ciénega de Flores≈ 10 µg/m³Moderate

Bad-air episodes in Nuevo León

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

Use this board

SmogRank, most polluted cities in Nuevo León, Mexico, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/mx/region/nuevo-leon?w=year.

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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.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.