Worst air pollution International Falls, today and tomorrow
Today (20 September): Air quality in International Falls is moderate. AQI and NO2 are moderate; PM2.5 is fair; PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (NO2: 50.3/100).
Tomorrow (21 September 2026): Air quality in International Falls is moderate. PM2.5 increases to moderate; PM10 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (NO2: 57.5/100). 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 International Falls, cold, clean Canadian border air is the main influence on air quality, and this is among the cleanest air quality in the continental US. Overall, International Falls sees air quality that tracks fairly closely with typical conditions for its wider region. As with most US destinations, conditions here are best understood by season rather than by a single yearly average.
Today - 20 September | Pollution peaks at 17:00
AQI:
Moderate
50.3/100
PM2.5 (fine particles):
Fair
39.8/100
PM10 (coarse particles):
Good
19.1/100
NO2 (nitrogen dioxide):
Moderate
50.3/100
O3 (ozone):
Good
15.0/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
16.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 15:00
AQI:
Moderate
57.5/100
PM2.5 (fine particles):
Moderate
40.9/100
PM10 (coarse particles):
Fair
23.0/100
NO2 (nitrogen dioxide):
Moderate
57.5/100
O3 (ozone):
Fair
26.0/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
2.5/100
PM1 (ultrafine particles):
Good
16.4/100
Pollen forecast in International Falls
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in International Falls
Frequently Asked Questions
Is air quality bad in International Falls right now?
On 20 September 2026, overall air quality in International Falls is moderate. AQI is the main air quality indicator at 50.3/100. Pollution peaks around 5:00 PM (NO2: 50.3/100).
Will air quality be worse tomorrow in International Falls?
On 21 September 2026, air quality conditions in International Falls will be similar to today, with AQI forecast at moderate at 57.5/100. Pollution peaks around 3:00 PM (NO2: 57.5/100).
When is air pollution at its worst in International Falls?
International Falls sees air quality change through the year, as the cleanest conditions usually come in winter, once the growing season dust and pollen have passed; by contrast, the combination of windy spring dust and hot, still summer days makes for the toughest stretch of the year. Farm-heavy surrounding land is the main source of the seasonal dust spikes.
Are air quality levels in International 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: 20 September 2026 at 14:33 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.
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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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