Worst air pollution Piedras Negras, today and tomorrow
Today (9 August): Air quality in Piedras Negras is very poor. AQI and PM10 are very poor; PM2.5 is poor; O3, SO2, and PM1 are fair; NO2, CO, and HCHO are good. Pollution peaks around 12:00 AM (PM10: 100/100).
Tomorrow (10 August 2026): Air quality in Piedras Negras is very poor. All pollutants stay as today. Pollution peaks around 2:00 PM (PM10: 90.7/100). 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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Piedras Negras's air quality reflects the flat Coahuila Rio Grande border position adjacent to Eagle Pass Texas, with vehicle traffic on surrounding roads and the maquiladora manufacturing and international border crossing corridor generating elevated vehicle and industrial emissions. The flat semi-arid terrain allows reasonable dispersal, while Gulf of Mexico breezes provide warm-season ventilation and the border crossing vehicle concentration represents the most distinctive local emission source throughout most of the year.
Today - 9 August | Pollution peaks at 00:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Poor
75.7/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
8.6/100
O3 (ozone):
Fair
24.9/100
SO2 (sulfur dioxide):
Fair
23.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Fair
25.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 14:00
AQI:
Very poor
90.7/100
PM2.5 (fine particles):
Poor
65.5/100
PM10 (coarse particles):
Very poor
90.7/100
NO2 (nitrogen dioxide):
Good
9.2/100
O3 (ozone):
Fair
29.4/100
SO2 (sulfur dioxide):
Fair
38.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.2/100
PM1 (ultrafine particles):
Fair
24.2/100
Pollen forecast in Piedras Negras
View pollen forecastFrequently Asked Questions
Is air quality bad in Piedras Negras right now?
On 9 August 2026, overall air quality in Piedras Negras is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 12:00 AM (PM10: 100/100).
Will air quality be worse tomorrow in Piedras Negras?
On 10 August 2026, air quality conditions in Piedras Negras will be similar to today, with AQI forecast at very poor at 90.7/100. Pollution peaks around 2:00 PM (PM10: 90.7/100).
When is air pollution at its worst in Piedras Negras?
Piedras Negras usually sees its poorest air quality when traffic emissions and textile and manufacturing operations coincide with periods when windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. These episodes tend to cluster in spring and autumn.
Are air quality levels in Piedras Negras 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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