SmogRank / World / North America / Mexico / San Luis Potosí

Most polluted cities in San Luis Potosí, Mexico

1 measured city, this year; 1 above the WHO annual guideline. The only one: San Luis Potosí at 29.4 µg/m³, #196 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.

DurangoGuanajuato: 8 measured citiesHidalgo: 7 measured citiesJalisco: 5 measured citiesNuevo León: 9 measured citiesPuebla: 2 measured citiesQuerétaro: 2 measured citiesSan Luis Potosí: 1 measured cityTamaulipas: 1 measured cityVeracruzZacatecasCoahuilaAguascalientes: 1 measured city#1 San Luis Potosí: 29.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1San Luis Potosílast full day 2 Oct 13%
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

San Luis Potosí 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
Soledad de Graciano Sánchez≈ 8 µg/m³Good
Ciudad Valles≈ 8 µg/m³Good
Matehuala≈ 6 µg/m³Good
Rioverde≈ 8 µg/m³Good
Ciudad Fernández≈ 8 µg/m³Good
Tamazunchale≈ 9 µg/m³Moderate
Ébano≈ 6 µg/m³Good
Salinas de Hidalgo≈ 7 µg/m³Good
Tamuín≈ 7 µg/m³Good
Cárdenas≈ 6 µg/m³Good

Bad-air episodes in San Luis Potosí

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 San Luis Potosí, Mexico, PM2.5, this year to 7 Oct 2026, 01:00 UTC, smogrank.com/mx/region/san-luis-potosi?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 2026-10-07 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.