Worst air pollution Casper, today and tomorrow
Today (9 August): Air quality in Casper is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (O3: 33.2/100).
Tomorrow (10 August 2026): Air quality in Casper is fair. All pollutants stay as today. Pollution peaks around 9:00 PM (NO2: 37.4/100). 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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Casper's air quality benefits from the elevated Wyoming continental divide position at 1,613 metres, with consistent Rocky Mountain westerly winds providing generally good background ventilation. Vehicle emissions from I-25 and the surrounding Sinclair Refinery and petroleum extraction operations from the Casper Arch oilfield contributing localised industrial and vehicle NOₓ are the primary local concerns, while the flat Wyoming high plains and consistent westerlies generally maintain moderate conditions throughout the year.
Today - 9 August | Pollution peaks at 05:00
AQI:
Fair
33.2/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
9.3/100
NO2 (nitrogen dioxide):
Fair
30.9/100
O3 (ozone):
Fair
33.2/100
SO2 (sulfur dioxide):
Good
2.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
8.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 21:00
AQI:
Fair
37.4/100
PM2.5 (fine particles):
Good
16.7/100
PM10 (coarse particles):
Good
9.7/100
NO2 (nitrogen dioxide):
Fair
37.4/100
O3 (ozone):
Fair
31.0/100
SO2 (sulfur dioxide):
Good
3.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
10.7/100
Pollen forecast in Casper
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Casper
Frequently Asked Questions
Is air quality bad in Casper right now?
On 9 August 2026, overall air quality in Casper is fair. AQI is the main air quality indicator at 33.2/100. Pollution peaks around 5:00 AM (O3: 33.2/100).
Will air quality be worse tomorrow in Casper?
On 10 August 2026, air quality conditions in Casper will be similar to today, with AQI forecast at fair at 37.4/100. Pollution peaks around 9:00 PM (NO2: 37.4/100).
When is air pollution at its worst in Casper?
Casper's air quality follows a clear seasonal pattern. Typically, autumn is often the cleanest stretch, between wildfire season and the onset of winter inversions, while valley and basin locations can see pollution trapped under cold air for days during winter inversions. Higher-elevation, more exposed locations generally avoid the worst of the valley inversion episodes.
Are air quality levels in Casper 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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