Worst air pollution Great Falls, today and tomorrow
Today (9 August): Air quality in Great Falls is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 37.8/100).
Tomorrow (10 August 2026): Air quality in Great Falls is fair. All pollutants stay as today. Pollution peaks around 11:00 AM (O3: 24.8/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Great Falls' air quality benefits from the flat Montana plains at 1,054 metres providing generally good wind dispersal, with vehicle emissions from US-87 the primary local source in this mid-sized Great Falls city. The Missouri River corridor provides natural ventilation, while occasional winter inversions along the Montana Front Range and summer wildfire smoke from the surrounding Montana forests and the Rocky Mountain Front are the primary seasonal air quality concerns throughout the year.
Today - 9 August | Pollution peaks at 06:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
16.7/100
PM10 (coarse particles):
Good
13.1/100
NO2 (nitrogen dioxide):
Fair
29.1/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
5.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.3/100
PM1 (ultrafine particles):
Good
8.6/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
24.8/100
PM2.5 (fine particles):
Good
8.9/100
PM10 (coarse particles):
Good
6.0/100
NO2 (nitrogen dioxide):
Fair
23.7/100
O3 (ozone):
Fair
24.8/100
SO2 (sulfur dioxide):
Good
5.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.9/100
PM1 (ultrafine particles):
Good
6.3/100
Pollen forecast in Great Falls
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Great Falls
Frequently Asked Questions
Is air quality bad in Great Falls right now?
On 9 August 2026, overall air quality in Great Falls is fair. AQI is the main air quality indicator at 37.8/100. Pollution peaks around 6:00 AM (O3: 37.8/100).
Will air quality be worse tomorrow in Great Falls?
On 10 August 2026, air quality conditions in Great Falls will be similar to today, with AQI forecast at fair at 24.8/100. Pollution peaks around 11:00 AM (O3: 24.8/100).
When is air pollution at its worst in Great Falls?
Great Falls sees air quality change through the year. In short, a brief window in autumn tends to bring the year's best air, before winter inversions set in, whereas summer brings regional wildfire smoke, while winter brings its own inversion-driven pollution episodes. Higher-elevation, more exposed locations generally avoid the worst of the valley inversion episodes.
Are air quality levels in Great Falls 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.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.