Worst air pollution West Peoria, today and tomorrow
Today (9 August): Air quality in West Peoria is fair. AQI, O3, and PM1 are fair; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 10:00 AM (O3: 38.1/100).
Tomorrow (10 August 2026): Air quality in West Peoria is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 36.1/100). Airmine updates local air quality forecasts four times daily.
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This part of the Peoria area sits near Caterpillar Inc.'s major manufacturing presence, though local emissions are shaped mainly by suburban traffic. Tree cover around Weldon Springs State Park woodlots and along the Sangamon River helps trap a share of local particulates before they spread further. Short-term spikes can still occur during unusual weather or nearby construction.
Today - 9 August | Pollution peaks at 10:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
16.4/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Good
17.3/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.9/100
PM1 (ultrafine particles):
Fair
21.5/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 10:00
AQI:
Fair
36.1/100
PM2.5 (fine particles):
Fair
21.4/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
18.2/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.6/100
PM1 (ultrafine particles):
Fair
25.6/100
Pollen forecast in West Peoria
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in West Peoria
Frequently Asked Questions
Is air quality bad in West Peoria right now?
On 9 August 2026, overall air quality in West Peoria is fair. AQI is the main air quality indicator at 38.1/100. Pollution peaks around 10:00 AM (O3: 38.1/100).
Will air quality be worse tomorrow in West Peoria?
On 10 August 2026, air quality conditions in West Peoria will be similar to today, with AQI forecast at fair at 36.1/100. Pollution peaks around 10:00 AM (O3: 36.1/100).
When is air pollution at its worst in West Peoria?
Winter around West Peoria typically brings the year's highest particulate readings, as heating and traffic emissions build up under calm, cold air. Warmer months bring a different challenge: ozone, formed when strong sun and heat interact with local emissions. The Illinois River valley here can trap cold-season emissions under calm winter conditions.
Are air quality levels in West 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.
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: 9 August 2026 at 20:27 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.
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