Worst air pollution Duluth, today and tomorrow
Today (16 July): Air quality in Duluth is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (O3: 48.7/100).
Tomorrow (17 July 2026): Air quality in Duluth is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 34.1/100). 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
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Duluth's air quality benefits from Lake Superior's powerful westerly lake winds providing some of the Great Lakes' strongest maritime ventilation. Vehicle emissions from I-35 and the BNSF ore port operations contribute local sources, while summer regional ozone from the Great Lakes industrial corridor is the primary warm-season concern throughout the year.
Today - 16 July | Pollution peaks at 05:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
14.1/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Fair
26.0/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Good
16.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
9.3/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Fair
22.9/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
11.4/100
Pollen forecast in Duluth
View pollen forecastFrequently Asked Questions
Is air quality bad in Duluth right now?
On 16 July 2026, overall air quality in Duluth is fair. NO2 is the main pollutant at 26.0/100. Pollution peaks around 5:00 AM (O3: 48.7/100).
Will air quality be worse tomorrow in Duluth?
On 17 July 2026, air quality conditions in Duluth will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 10:00 AM (O3: 34.1/100).
When is air pollution at its worst in Duluth?
Like most US cities, Duluth sees air quality shift from season to season: the calmest air usually arrives in winter, between planting and harvest dust events, but summer heat and humidity drive ozone formation, and agricultural dust can spike particulate levels during planting and harvest. Wide-open terrain generally helps disperse pollution quickly once the wind picks up.
Are air quality levels in Duluth 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.
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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