Worst air pollution Ann Arbor, today and tomorrow
Today (16 July): Air quality in Ann Arbor is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 36.3/100).
Tomorrow (17 July 2026): Air quality in Ann Arbor is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 38.8/100). 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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Ann Arbor's air quality is generally good, benefiting from the Huron River valley greenway and the University of Michigan's relatively low industrial emissions character compared to neighbouring Detroit. Vehicle emissions from US-23 and I-94 are the primary local sources, while the flat southeast Michigan terrain generally allows reasonable dispersal. Great Lakes westerlies periodically bring clean air from Lake Michigan, and summer regional ozone from the industrial Great Lakes corridor is the primary warm-season concern.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
36.3/100
PM2.5 (fine particles):
Good
10.6/100
PM10 (coarse particles):
Good
8.4/100
NO2 (nitrogen dioxide):
Good
1.9/100
O3 (ozone):
Fair
36.3/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Good
4.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
38.8/100
PM2.5 (fine particles):
Good
8.7/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
2.2/100
O3 (ozone):
Fair
38.8/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
5.2/100
Pollen forecast in Ann Arbor
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Ann Arbor
Frequently Asked Questions
Is air quality bad in Ann Arbor right now?
On 16 July 2026, overall air quality in Ann Arbor is fair. AQI is the main air quality indicator at 36.3/100. Pollution peaks around 1:00 PM (O3: 36.3/100).
Will air quality be worse tomorrow in Ann Arbor?
On 17 July 2026, air quality conditions in Ann Arbor will be similar to today, with AQI forecast at fair at 38.8/100. Pollution peaks around 1:00 PM (O3: 38.8/100).
When is air pollution at its worst in Ann Arbor?
Ann Arbor experiences a distinct seasonal swing in air quality, as the cleanest stretches usually come in spring and fall, between the summer ozone season and the calmer winter pollution episodes; by contrast, summer heat waves are the main driver of poor air quality, as ozone builds under stagnant, humid conditions. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Ann Arbor 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