Illinois
 
Data courtesy of:
 

AQI Forecast - http://files.airnowtech.org/airnow/today/forecast_aqi_20160209_ia_il_mo.jpg
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 - http://files.airnowtech.org/airnow/today/cur_aqi_ia_il_mo.jpg
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
AQI Animation - http://files.airnowtech.org/airnow/today/anim_aqi_ia_il_mo.gif
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
State Air Quality Resources
Illinois EPA - Air Quality Index (AQI)
Illinois EPA - Air Quality Information
Illinois EPA - Bureau of Air
Illinois EPA - Contact Information
Illinois Environmental Protection Agency (EPA)
Partners for Clean Air
Respiratory Health Association of Metropolitan Chicago
Click on the city name for more detailed information.

printable summary
FORECAST CURRENT
AQI
Tue
Feb 9
Wed
Feb 10
Aurora/Elgin
aqi not available
aqi not available
 
Chicago
Good
Good
23 
Peoria
Good
Good
23 
Rock Island-Moline
Good
Good
24 
Rockford
Good
Good
22 
Springfield
Good
Good
26 
St. Louis (Metro-east)
Good
Good
23 
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.