Worst air pollution Great Falls, today and tomorrow
Today (16 July): Air quality in Great Falls is fair. PM1 is fair; AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 5:00 AM (O3: 51.8/100).
Tomorrow (17 July 2026): Air quality in Great Falls is fair. NO2 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 8:00 AM (O3: 44.2/100). 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
Use our Strava plugin to check your own exposure.
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 - 16 July | Pollution peaks at 05:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Medium
50.3/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Fair
22.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 08:00
AQI:
Medium
44.2/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
33.2/100
O3 (ozone):
Medium
44.2/100
SO2 (sulfur dioxide):
Good
5.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Good
15.4/100
Pollen forecast in Great Falls
View pollen forecastFrequently Asked Questions
Is air quality bad in Great Falls right now?
On 16 July 2026, overall air quality in Great Falls is fair. PM1 is the main pollutant at 22.3/100. Pollution peaks around 5:00 AM (O3: 51.8/100).
Will air quality be worse tomorrow in Great Falls?
On 17 July 2026, air quality conditions in Great Falls will be similar to today, with NO2 forecast at fair at 33.2/100. Pollution peaks around 8:00 AM (O3: 44.2/100).
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.
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: 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