Worst air pollution Idaho Falls, today and tomorrow
Today (9 August): Air quality in Idaho Falls is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 38.4/100).
Tomorrow (10 August 2026): Air quality in Idaho Falls is fair. AQI improves to medium; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 42.6/100). Airmine updates local air quality forecasts four times daily.
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Idaho Falls' air quality reflects the Snake River Plain's partial topographic enclosure between the Caribou and Lemhi mountain ranges, with vehicle emissions from US-20 and the surrounding agricultural and Idaho National Laboratory operations contributing local sources. Winter temperature inversions can trap emissions, while summer wildfire smoke from surrounding Idaho forests is an increasingly severe seasonal concern.
Today - 9 August | Pollution peaks at 00:00
AQI:
Fair
38.4/100
PM2.5 (fine particles):
Good
14.8/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Fair
38.4/100
O3 (ozone):
Fair
36.8/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
11.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Medium
42.6/100
PM2.5 (fine particles):
Good
14.4/100
PM10 (coarse particles):
Good
8.0/100
NO2 (nitrogen dioxide):
Medium
42.6/100
O3 (ozone):
Fair
31.8/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
10.1/100
Pollen forecast in Idaho Falls
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Idaho Falls
Frequently Asked Questions
Is air quality bad in Idaho Falls right now?
On 9 August 2026, overall air quality in Idaho Falls is fair. AQI is the main air quality indicator at 38.4/100. Pollution peaks around 12:00 AM (NO2: 38.4/100).
Will air quality be worse tomorrow in Idaho Falls?
On 10 August 2026, air quality conditions in Idaho Falls will be similar to today, with O3 forecast at fair at 31.8/100. Pollution peaks around 4:00 PM (NO2: 42.6/100).
When is air pollution at its worst in Idaho Falls?
Like most US cities, Idaho Falls sees air quality shift from season to season — autumn is often the cleanest stretch, between wildfire season and the onset of winter inversions, 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 Idaho 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.
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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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