Worst air pollution Collinsville, today and tomorrow
Today (9 August): Air quality in Collinsville 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: 32.4/100).
Tomorrow (10 August 2026): Air quality in Collinsville is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 36.0/100). 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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Air quality around Collinsville mostly reflects traffic, heating, and general land use in the area. Giant City State Park woodlots and the vegetation along the Mississippi River provide some natural buffering against local particulate matter. Most of the daily variation comes down to shifting winds and the season's typical weather patterns.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
32.4/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Good
15.7/100
O3 (ozone):
Fair
32.4/100
SO2 (sulfur dioxide):
Good
3.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.4/100
PM1 (ultrafine particles):
Good
8.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 08:00
AQI:
Fair
36.0/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Good
7.2/100
O3 (ozone):
Fair
36.0/100
SO2 (sulfur dioxide):
Good
3.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
7.4/100
Pollen forecast in Collinsville
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Collinsville
Frequently Asked Questions
Is air quality bad in Collinsville right now?
On 9 August 2026, overall air quality in Collinsville is fair. AQI is the main air quality indicator at 32.4/100. Pollution peaks around 11:00 AM (O3: 32.4/100).
Will air quality be worse tomorrow in Collinsville?
On 10 August 2026, air quality conditions in Collinsville will be similar to today, with AQI forecast at fair at 36.0/100. Pollution peaks around 8:00 AM (O3: 36.0/100).
When is air pollution at its worst in Collinsville?
Winter around Collinsville typically brings the year's highest particulate readings, as heating and traffic emissions build up under calm, cold air. Summer heat and sunlight typically push ozone to the top of the seasonal concerns here. Regional wildfire smoke can occasionally push readings higher during otherwise typical summer weather. Air quality tends to be at its best in spring and fall, when temperatures are milder and winds more consistent.
Are air quality levels in Collinsville 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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