Worst air pollution Peoria, today and tomorrow
Today (16 July): Air quality in Peoria is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 37.6/100).
Tomorrow (17 July 2026): Air quality in Peoria is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 40.4/100). 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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Peoria's air quality reflects the Illinois River valley's flat Midwest terrain providing generally good wind dispersal, with vehicle emissions from I-74 and US-150 and the surrounding Caterpillar manufacturing and agricultural equipment industry contributing elevated PM2.5. The Illinois River provides a natural ventilation corridor, while regional ozone from agricultural and industrial sources across the broader Midwest airshed can temporarily elevate summer readings across this mid-sized Illinois river city.
Today - 16 July | Pollution peaks at 11:00
AQI:
Fair
37.6/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
12.7/100
NO2 (nitrogen dioxide):
Good
11.2/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
6.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Medium
40.4/100
PM2.5 (fine particles):
Good
8.5/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
19.1/100
O3 (ozone):
Medium
40.4/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.0/100
PM1 (ultrafine particles):
Good
5.4/100
Pollen forecast in Peoria
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Peoria
Frequently Asked Questions
Is air quality bad in Peoria right now?
On 16 July 2026, overall air quality in Peoria is fair. AQI is the main air quality indicator at 37.6/100. Pollution peaks around 11:00 AM (O3: 37.6/100).
Will air quality be worse tomorrow in Peoria?
On 17 July 2026, air quality conditions in Peoria will be better than today, with AQI forecast at medium at 40.4/100. Pollution peaks around 11:00 AM (O3: 40.4/100).
When is air pollution at its worst in Peoria?
Peoria follows a fairly predictable seasonal air quality pattern. In short, spring and autumn tend to bring the cleanest, most stable air, whereas the hottest, most humid summer days bring the year's worst ozone readings. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Peoria 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