Worst air pollution Champaign, today and tomorrow
Today (30 August): Air quality in Champaign is moderate. AQI and O3 are moderate; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 42.4/100).
Tomorrow (31 August 2026): Air quality in Champaign is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 31.4/100). Airmine updates local air quality forecasts four times daily.
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Champaign's air quality benefits from the flat Illinois agricultural plain providing excellent natural wind dispersal, with prevailing westerly Prairie State winds generally keeping readings at moderate to low levels. Vehicle emissions from I-57 and I-72 and the University of Illinois campus traffic are the primary local sources, while agricultural ammonia from the surrounding Champaign County corn and soy operations contributes secondary particulate formation and summer regional ozone from agricultural and Midwest industrial sources is the primary warm-season concern.
Today - 30 August | Pollution peaks at 09:00
AQI:
Moderate
42.4/100
PM2.5 (fine particles):
Good
9.0/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Good
18.9/100
O3 (ozone):
Moderate
42.4/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
5.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 11:00
AQI:
Fair
31.4/100
PM2.5 (fine particles):
Good
10.2/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
12.4/100
O3 (ozone):
Fair
31.4/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
5.9/100
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Frequently Asked Questions
Is air quality bad in Champaign right now?
On 30 August 2026, overall air quality in Champaign is moderate. AQI is the main air quality indicator at 42.4/100. Pollution peaks around 9:00 AM (O3: 42.4/100).
Will air quality be worse tomorrow in Champaign?
On 31 August 2026, air quality conditions in Champaign will be better than today, with AQI forecast at fair at 31.4/100. Pollution peaks around 11:00 AM (O3: 31.4/100).
When is air pollution at its worst in Champaign?
Conditions in Champaign vary noticeably across the seasons. Typically, the mildest, cleanest weather usually falls in spring and autumn, while prolonged summer heat waves are when air quality most often dips into unhealthy territory. Calm, cold winter spells can occasionally allow local pollution to build up before the next weather system clears it.
Are air quality levels in Champaign 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: 30 August 2026 at 20:26 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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