Worst air pollution Valle de Santiago, today and tomorrow
Today (16 July): Air quality in Valle de Santiago is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 43.3/100).
Tomorrow (17 July 2026): Air quality in Valle de Santiago is fair. PM2.5 increases to fair; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 6:00 AM (PM10: 40.9/100). 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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Valle de Santiago's air quality reflects the flat Guanajuato Bajío plateau at 1,735 metres, with vehicle traffic on surrounding roads and the strawberry, broccoli, and agricultural corridor contributing local sources. The elevated plateau position aids dispersal on most days, while winter inversions create modest seasonal challenges and Valle de Santiago generally maintains moderate Mexican central Bajío agricultural plateau readings throughout most of the year.
Today - 16 July | Pollution peaks at 00:00
AQI:
Medium
43.3/100
PM2.5 (fine particles):
Medium
42.3/100
PM10 (coarse particles):
Medium
43.3/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
20.9/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
6.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 06:00
AQI:
Medium
40.9/100
PM2.5 (fine particles):
Fair
29.9/100
PM10 (coarse particles):
Medium
40.9/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Good
19.1/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
4.7/100
Frequently Asked Questions
Is air quality bad in Valle de Santiago right now?
On 16 July 2026, overall air quality in Valle de Santiago is fair. O3 is the main pollutant at 20.9/100. Pollution peaks around 12:00 AM (PM10: 43.3/100).
Will air quality be worse tomorrow in Valle de Santiago?
On 17 July 2026, air quality conditions in Valle de Santiago will be similar to today, with PM2.5 forecast at fair at 29.9/100. Pollution peaks around 6:00 AM (PM10: 40.9/100).
When is air pollution at its worst in Valle de Santiago?
In Valle de Santiago, vehicle traffic together with crop farming are the main local sources, with conditions worsening when winds are light and dispersion is poor. Local weather patterns add further variation on top of these sources. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Valle de Santiago 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