Worst air pollution Stephenville, today and tomorrow
Today (9 August): Air quality in Stephenville is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 PM (PM10: 43.4/100).
Tomorrow (10 August 2026): Air quality in Stephenville is fair. AQI worsens to fair; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (PM10: 33.0/100). 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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In Stephenville, dry north-central Texas wind is the main influence on air quality, and cedar pollen in winter is a notable local seasonal spike. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Visitors and residents alike tend to notice the clearest air outside the warmest summer weeks.
Today - 9 August | Pollution peaks at 20:00
AQI:
Medium
43.4/100
PM2.5 (fine particles):
Fair
40.0/100
PM10 (coarse particles):
Medium
43.4/100
NO2 (nitrogen dioxide):
Good
2.7/100
O3 (ozone):
Fair
22.7/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
11.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
33.0/100
PM2.5 (fine particles):
Fair
31.7/100
PM10 (coarse particles):
Fair
33.0/100
NO2 (nitrogen dioxide):
Good
5.1/100
O3 (ozone):
Fair
20.2/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
11.6/100
Pollen forecast in Stephenville
View pollen forecastFrequently Asked Questions
Is air quality bad in Stephenville right now?
On 9 August 2026, overall air quality in Stephenville is fair. PM2.5 is the main pollutant at 40.0/100. Pollution peaks around 8:00 PM (PM10: 43.4/100).
Will air quality be worse tomorrow in Stephenville?
On 10 August 2026, air quality conditions in Stephenville will be similar to today, with AQI forecast at fair at 33.0/100. Pollution peaks around 11:00 AM (PM10: 33.0/100).
When is air pollution at its worst in Stephenville?
Stephenville follows a fairly predictable seasonal air quality pattern: the cleanest air usually comes in the milder shoulder seasons of spring and autumn, but long, hot summers bring the highest ozone risk, especially across the major urban corridors. Dust from West Texas can occasionally drift across the state and add to particulate levels.
Are air quality levels in Stephenville 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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