SmogRank / World / North America / Mexico / Coahuila
Most polluted cities in Coahuila, Mexico
No city in Coahuila, Mexico has enough readings to rank so far this year.
A city joins this ranking with enough days of readings so far this year; none here has that right now, so there is nothing to map or chart.
Last 24 hours: 1 measured city · Last 7 days: 1 measured city · Last 30 days: 1 measured city
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
Coahuila 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 |
|---|---|
| Torreón | ≈ 14 µg/m³ |
| Ciudad Acuña | ≈ 5 µg/m³ |
| Monclova | ≈ 11 µg/m³ |
| Frontera | ≈ 11 µg/m³ |
| Ramos Arizpe | ≈ 9 µg/m³ |
| Sabinas | ≈ 8 µg/m³ |
| Matamoros | ≈ 12 µg/m³ |
| San Pedro | ≈ 10 µg/m³ |
| San Pedro | ≈ 12 µg/m³ |
| Nueva Rosita | ≈ 8 µg/m³ |
| Ciudad Melchor Múzquiz | ≈ 8 µg/m³ |
| Parras de la Fuente | ≈ 8 µg/m³ |
| Francisco I. Madero | ≈ 12 µg/m³ |
| Castaños | ≈ 11 µg/m³ |
| Nava | ≈ 8 µg/m³ |
| Allende | ≈ 8 µg/m³ |
| San Buenaventura | ≈ 10 µg/m³ |
| Palaú | ≈ 8 µg/m³ |
Bad-air episodes in Coahuila
- Southern United States and Mexico, March and April 202530 March to 1 April 2025, 3 days9 cities111 µg/m³peak, Saltillo
- Southern United States and Mexico, June 20242 to 6 June 2024, 5 days22 cities86 µg/m³peak, Saltillo
- Southern United States and Mexico, 19 to 28 May 202410 days44 cities75 µg/m³peak, Port Isabel
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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.