Worst air pollution Ciudad Valles, today and tomorrow
Today (16 July): Air quality in Ciudad Valles is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (PM10: 43.6/100).
Tomorrow (17 July 2026): Air quality in Ciudad Valles is fair. AQI worsens to fair; PM2.5 increases to fair; PM10 increases to fair; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (PM10: 39.7/100). 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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Ciudad Valles's air quality reflects the San Luis Potosí Valles Huasteca region's Tampaón River valley at 80 metres, with vehicle traffic on surrounding roads and the sugarcane, citrus, and agricultural corridor contributing local sources. The flat Gulf coastal plain allows reasonable dispersal, while Gulf of Mexico breezes provide warm-season ventilation and Ciudad Valles generally maintains moderate northeastern Mexican Gulf coastal plain agricultural readings throughout most of the year.
Today - 16 July | Pollution peaks at 03:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Medium
41.2/100
PM10 (coarse particles):
Medium
43.6/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
24.9/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
6.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:00
AQI:
Fair
39.7/100
PM2.5 (fine particles):
Fair
29.6/100
PM10 (coarse particles):
Fair
39.7/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
19.7/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Good
4.7/100
Frequently Asked Questions
Is air quality bad in Ciudad Valles right now?
On 16 July 2026, overall air quality in Ciudad Valles is fair. O3 is the main pollutant at 24.9/100. Pollution peaks around 3:00 AM (PM10: 43.6/100).
Will air quality be worse tomorrow in Ciudad Valles?
On 17 July 2026, air quality conditions in Ciudad Valles will be similar to today, with AQI forecast at fair at 39.7/100. Pollution peaks around 10:00 AM (PM10: 39.7/100).
When is air pollution at its worst in Ciudad Valles?
The biggest local contributors to pollution in Ciudad Valles are traffic on the surrounding roads together with farming and agricultural processing, particularly once the sea breeze weakens. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Ciudad Valles 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