Worst air pollution Normal, today and tomorrow
Today (16 July): Air quality in Normal is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 36.2/100).
Tomorrow (17 July 2026): Air quality in Normal is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 38.9/100). 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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Normal's air quality in Illinois benefits from the flat Heartland prairie providing excellent wind dispersal, with vehicle emissions from I-55 and the Illinois State University campus and surrounding automotive manufacturing — Normal hosting Rivian's EV assembly plant — contributing local sources. Agricultural ammonia from surrounding Corn Belt farming contributes secondary particulate formation, while summer ozone from Midwest agricultural and industrial sources is the primary warm-season concern throughout the year.
Today - 16 July | Pollution peaks at 08:00
AQI:
Fair
36.2/100
PM2.5 (fine particles):
Good
10.5/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Good
6.9/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.6/100
PM1 (ultrafine particles):
Good
5.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 08:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
7.6/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
5.3/100
Pollen forecast in Normal
View pollen forecastFrequently Asked Questions
Is air quality bad in Normal right now?
On 16 July 2026, overall air quality in Normal is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 8:00 AM (O3: 36.2/100).
Will air quality be worse tomorrow in Normal?
On 17 July 2026, air quality conditions in Normal will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 8:00 AM (O3: 38.9/100).
When is air pollution at its worst in Normal?
Normal's air quality follows a clear seasonal pattern, as the mildest, cleanest weather usually falls in spring and autumn; by contrast, prolonged summer heat waves are when air quality most often dips into unhealthy territory. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Normal 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