Highest air pollution Chicago, today and tomorrow
Today (27 June): Air quality in Chicago 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: 37.5/100).
Tomorrow (28 June 2026): Air quality in Chicago is fair. All pollutants stay as today. Pollution peaks around 6:00 AM (O3: 37.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Chicago's air quality is shaped by Lake Michigan's powerful onshore winds that regularly flush pollutants from the lakefront, producing a marked difference between the clean eastern shoreline and the more polluted western and southern industrial corridors. Winter inversions and heavy road salt PM10 elevate readings seasonally.
Today - 27 June | Pollution peaks at 08:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
5.3/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
4.7/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Good
4.2/100
Levels show the poorest local air quality during the day
Tomorrow - 28 June | Pollution peaks at 06:00
AQI:
Fair
37.0/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Good
5.4/100
O3 (ozone):
Fair
37.0/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.4/100
PM1 (ultrafine particles):
Good
5.1/100
Pollen forecast in Chicago
View pollen forecastFrequently Asked Questions
Is air quality bad in Chicago right now?
On 27 June 2026, overall air quality in Chicago is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 8:00 AM (O3: 37.5/100).
Will air quality be worse tomorrow in Chicago?
On 28 June 2026, air quality conditions in Chicago will be similar to today, with AQI forecast at fair at 37.0/100. Pollution peaks around 6:00 AM (O3: 37.0/100).
Are air quality levels in Chicago 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.
Want to see air quality forecasts for other cities in United States?
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Data provided by Airmine — Last update: 27 June 2026 at 18:36 CET (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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team