Worst air pollution San Francisco de la Piedad, today and tomorrow
Today (16 July): Air quality in San Francisco de la Piedad is medium. AQI, PM2.5, and PM10 are medium; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 49.9/100).
Tomorrow (17 July 2026): Air quality in San Francisco de la Piedad is medium. All pollutants stay as today. Pollution peaks around 5:00 AM (PM10: 49.4/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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San Francisco de la Piedad in Guanajuato reflects the flat Bajío plateau agricultural position adjacent to Celaya, with vehicle traffic on surrounding roads and the agricultural and light manufacturing corridor contributing local sources. The elevated plateau position aids dispersal on most days, while winter inversions create modest seasonal challenges and the area generally maintains moderate Mexican central Bajío agricultural plain readings throughout most of the year.
Today - 16 July | Pollution peaks at 00:00
AQI:
Medium
49.9/100
PM2.5 (fine particles):
Medium
47.6/100
PM10 (coarse particles):
Medium
49.9/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
19.8/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
9.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Medium
49.4/100
PM2.5 (fine particles):
Medium
40.4/100
PM10 (coarse particles):
Medium
49.4/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
19.2/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
5.7/100
Frequently Asked Questions
Is air quality bad in San Francisco de la Piedad right now?
On 16 July 2026, overall air quality in San Francisco de la Piedad is medium. AQI is the main air quality indicator at 49.9/100. Pollution peaks around 12:00 AM (PM10: 49.9/100).
Will air quality be worse tomorrow in San Francisco de la Piedad?
On 17 July 2026, air quality conditions in San Francisco de la Piedad will be similar to today, with AQI forecast at medium at 49.4/100. Pollution peaks around 5:00 AM (PM10: 49.4/100).
When is air pollution at its worst in San Francisco de la Piedad?
In San Francisco de la Piedad, traffic on the surrounding roads, manufacturing and food processing, and agricultural burning are the main local sources, with conditions worsening when winds are light and dispersion is poor. Day-to-day conditions here depend heavily on the weather. Conditions can otherwise vary considerably with the weather.
Are air quality levels in San Francisco de la Piedad 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