Worst air pollution San Luis Potosí, today and tomorrow
Today (16 July): Air quality in San Luis Potosí is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (PM10: 41.5/100).
Tomorrow (17 July 2026): Air quality in San Luis Potosí is fair. AQI worsens to fair; PM10 increases to fair; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (PM10: 35.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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San Luis Potosí's air quality reflects the flat central Mexican plateau at 1,877 metres in the San Luis Potosí valley, with vehicle traffic on surrounding roads and the automotive manufacturing — San Luis Potosí hosting major BMW plant — and mining corridor generating elevated industrial emissions. The elevated plateau position aids dispersal on most days, while winter inversions create seasonal challenges and the automotive manufacturing character creates a distinctive industrial emission profile throughout most of the year.
Today - 16 July | Pollution peaks at 03:00
AQI:
Medium
41.5/100
PM2.5 (fine particles):
Fair
39.3/100
PM10 (coarse particles):
Medium
41.5/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
24.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
5.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:00
AQI:
Fair
35.0/100
PM2.5 (fine particles):
Fair
26.0/100
PM10 (coarse particles):
Fair
35.0/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
19.7/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
4.1/100
Frequently Asked Questions
Is air quality bad in San Luis Potosí right now?
On 16 July 2026, overall air quality in San Luis Potosí is fair. PM2.5 is the main pollutant at 39.3/100. Pollution peaks around 3:00 AM (PM10: 41.5/100).
Will air quality be worse tomorrow in San Luis Potosí?
On 17 July 2026, air quality conditions in San Luis Potosí will be similar to today, with AQI forecast at fair at 35.0/100. Pollution peaks around 10:00 AM (PM10: 35.0/100).
When is air pollution at its worst in San Luis Potosí?
San Luis Potosí usually sees its poorest air quality when road traffic, quarrying activity, as well as manufacturing activity coincide with periods when temperature inversions set in over the valley. The surrounding valley terrain holds pollutants near the surface rather than letting them disperse. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher.
Are air quality levels in San Luis Potosí based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app