Worst air pollution Medinah Country Club – Course No. 3 - Chicago, today and tomorrow
Today (18 July): Air quality in Medinah Country Club – Course No. 3 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: 37.7/100).
Tomorrow (19 July 2026): Air quality in Medinah Country Club – Course No. 3 is fair. All pollutants stay as today. Pollution peaks around 10:00 AM (O3: 37.3/100). 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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Medinah Country Club Course No. 3 air quality reflects the flat Illinois DuPage County suburban position, with vehicle traffic on surrounding roads and major championship visitor traffic contributing seasonal local sources. The broader Chicago metropolitan regional ozone is the primary warm-season concern, while the flat terrain allows reasonable dispersal and the course's extraordinary mature tree canopy provides exceptional natural filtration throughout most of the year.
Today - 18 July | Pollution peaks at 08:00
AQI:
Fair
37.7/100
PM2.5 (fine particles):
Good
11.7/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
10.8/100
O3 (ozone):
Fair
37.7/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
7.9/100
Levels show the poorest local air quality during the day
Tomorrow - 19 July | Pollution peaks at 10:00
AQI:
Fair
37.3/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Good
6.0/100
O3 (ozone):
Fair
37.3/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.7/100
PM1 (ultrafine particles):
Good
7.7/100
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Frequently Asked Questions
Is air quality bad in Medinah Country Club – Course No. 3 right now?
On 18 July 2026, overall air quality in Medinah Country Club – Course No. 3 is fair. AQI is the main air quality indicator at 37.7/100. Pollution peaks around 8:00 AM (O3: 37.7/100).
Will air quality be worse tomorrow in Medinah Country Club – Course No. 3?
On 19 July 2026, air quality conditions in Medinah Country Club – Course No. 3 will be similar to today, with AQI forecast at fair at 37.3/100. Pollution peaks around 10:00 AM (O3: 37.3/100).
When is air pollution at its worst in Medinah Country Club – Course No. 3?
Air quality around Medinah Country Club – Course No. 3 changes with the seasons — spring and autumn tend to bring the cleanest, most stable air, whereas summer heat waves are the main driver of poor air quality, as ozone builds under stagnant, humid conditions. Lake-effect winds can help clear the air on many days near the Great Lakes shoreline.
Are air quality levels in Medinah Country Club – Course No. 3 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: 18 July 2026 at 21:30 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