SmogRank / World / North America / Mexico / Morelos

Most polluted cities in Morelos, Mexico

2 measured cities, this year; 2 above the WHO annual guideline. Worst: Zacatepec de Hidalgo at 18.1 µg/m³, #415 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.

GuerreroMéxico: 2 measured citiesMorelos: 2 measured citiesOaxacaPuebla: 2 measured citiesTlaxcalaVeracruzMexico City: 1 measured city#2 Cuernavaca: 15.1 µg/m³#1 Zacatepec de Hidalgo: 18.1 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Zacatepec de Hidalgo 9%
  2. 2Cuernavaca 1%
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

Morelos 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
Jiutepec≈ 11 µg/m³Moderate
Yautepec≈ 11 µg/m³Moderate
Temixco≈ 11 µg/m³Moderate
Emiliano Zapata≈ 11 µg/m³Moderate
Puente de Ixtla≈ 11 µg/m³Moderate
Xoxocotla≈ 11 µg/m³Moderate
Xochitepec≈ 11 µg/m³Moderate
Jojutla≈ 11 µg/m³Moderate
Tlaquiltenango≈ 11 µg/m³Moderate
Tres de Mayo≈ 11 µg/m³Moderate
Axochiapan≈ 10 µg/m³Moderate
Yecapixtla≈ 10 µg/m³Moderate
Santa Rosa Treinta≈ 11 µg/m³Moderate

Bad-air episodes in Morelos

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

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SmogRank, most polluted cities in Morelos, Mexico, PM2.5, this year to 6 Oct 2026, 21:00 UTC, smogrank.com/mx/region/morelos?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 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.