Worst air pollution San Luis Río Colorado, today and tomorrow
Today (15 July): Air quality in San Luis Río Colorado is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (PM10: 40.6/100).
Tomorrow (16 July 2026): Air quality in San Luis Río Colorado is fair. AQI worsens to fair; PM2.5 decreases to good; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 9:00 AM (O3: 27.5/100). 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 Luis Río Colorado's air quality reflects the flat Sonora-Arizona Colorado River delta desert border position adjacent to Yuma Arizona, with vehicle traffic on surrounding roads and the agricultural, maquiladora, and border crossing corridor contributing local sources. Windblown Sonoran and Yuma Desert dust contributes elevated PM10, while the flat desert terrain allows reasonable dispersal on most days and San Luis generally maintains moderate to good northwestern Mexican Sonoran Desert border city readings throughout most of the year.
Today - 15 July | Pollution peaks at 07:00
AQI:
Medium
40.6/100
PM2.5 (fine particles):
Fair
26.8/100
PM10 (coarse particles):
Medium
40.6/100
NO2 (nitrogen dioxide):
Good
1.6/100
O3 (ozone):
Fair
27.1/100
SO2 (sulfur dioxide):
Good
5.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
5.0/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
27.5/100
PM2.5 (fine particles):
Good
16.5/100
PM10 (coarse particles):
Fair
25.1/100
NO2 (nitrogen dioxide):
Good
2.2/100
O3 (ozone):
Fair
27.5/100
SO2 (sulfur dioxide):
Good
6.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
4.0/100
Pollen forecast in San Luis Río Colorado
View pollen forecastFrequently Asked Questions
Is air quality bad in San Luis Río Colorado right now?
On 15 July 2026, overall air quality in San Luis Río Colorado is fair. O3 is the main pollutant at 27.1/100. Pollution peaks around 7:00 AM (PM10: 40.6/100).
Will air quality be worse tomorrow in San Luis Río Colorado?
On 16 July 2026, air quality conditions in San Luis Río Colorado will be similar to today, with AQI forecast at fair at 27.5/100. Pollution peaks around 9:00 AM (O3: 27.5/100).
When is air pollution at its worst in San Luis Río Colorado?
Air quality in San Luis Río Colorado tends to be worse when traffic on the surrounding roads together with crop farming build up and dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. This is most noticeable during spring and autumn wind events.
Are air quality levels in San Luis Río Colorado 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