SmogRank / World / North America / Mexico / Chihuahua
Most polluted cities in Chihuahua, Mexico
1 measured city, this year; 1 above the WHO annual guideline. The only one: Ciudad Juárez at 12.1 µg/m³, #719 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.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Ciudad Juárez 2%
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
Chihuahua 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.
| City | 7-day estimate |
|---|---|
| Chihuahua | ≈ 6 µg/m³ |
| Cuauhtémoc | ≈ 5 µg/m³ |
| Ciudad Delicias | ≈ 4 µg/m³ |
| Hidalgo del Parral | ≈ 5 µg/m³ |
| Nuevo Casas Grandes | ≈ 3 µg/m³ |
| Santa Rosalía de Camargo | ≈ 5 µg/m³ |
| Ojinaga | ≈ 4 µg/m³ |
| Manuel Ojinaga | ≈ 4 µg/m³ |
| Pedro Meoqui | ≈ 4 µg/m³ |
| Juan Aldama | ≈ 6 µg/m³ |
| Madera | ≈ 5 µg/m³ |
Bad-air episodes in Chihuahua
- South-western United States and Mexico, May 202513 to 14 May 2025, 2 days8 cities90 µg/m³peak, Sunland Park
- South-western United States and Mexico, April 20251 to 2 April 2025, 2 days8 cities166 µg/m³peak, El Paso
- South-western United States and Mexico, March 202518 March 2025, 1 day10 cities230 µg/m³peak, El Paso
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 Chihuahua, Mexico, PM2.5, this year to 7 Oct 2026, 01:00 UTC, smogrank.com/mx/region/chihuahua?w=year.
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 2026-10-07 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.