SmogRank / World / North America / Mexico / Hidalgo
Most polluted cities in Hidalgo, Mexico
5 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Atotonilco de Tula at 14.3 µg/m³, #368 in the world.
About 0 people in this city breathed unhealthy air on an average day over the last 30 days.
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.
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
Hidalgo 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 |
|---|---|
| Tizayuca | ≈ 8 µg/m³ |
| Huejutla de Reyes | ≈ 10 µg/m³ |
| Ixmiquilpan | ≈ 7 µg/m³ |
| Actopan | ≈ 7 µg/m³ |
| Fray Bernardino de Sahagún | ≈ 10 µg/m³ |
| Apan | ≈ 10 µg/m³ |
| Zacualtipán | ≈ 7 µg/m³ |
| Cuautepec | ≈ 7 µg/m³ |
| Don Antonio | ≈ 8 µg/m³ |
| Progreso de Obregón | ≈ 7 µg/m³ |
| Santiago Tulantepec | ≈ 7 µg/m³ |
| Tepeapulco | ≈ 10 µg/m³ |
Bad-air episodes in Hidalgo
- Mexico, January 20265 to 9 January 2026, 5 days13 cities128 µg/m³peak, Aguascalientes
- Southern Mexico, January 20261 January 2026, 1 day20 cities182 µg/m³peak, Tlaquepaque
- Hidalgo, Puebla and Querétaro, Mexico, November 202520 to 21 November 2025, 2 days9 cities88 µg/m³peak, Cholula
- Southern Mexico, March 202520 March 2025, 1 day8 cities59 µg/m³peak, Irapuato
- Southern Mexico, June 20246 to 7 June 2024, 2 days17 cities63 µg/m³peak, Tehuacán
- Southern Mexico, January 20241 January 2024, 1 day17 cities136 µg/m³peak, Salamanca
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 Hidalgo, Mexico, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/mx/region/hidalgo?w=30d.
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.