Illinois
 
Data courtesy of:
 

AQI Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20160924_ia_il_mo.jpg Map Map Map Map Map Map Map Map Map Map Map Map Map Map Map
 
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.
 - https://files.airnowtech.org/airnow/today/cur_aqi_ia_il_mo.jpg Map Map Map Map Map Map Map Map Map Map Map Map Map Map Map
 
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 - https://files.airnowtech.org/airnow/today/anim_aqi_ia_il_mo.gif Map Map Map Map Map Map Map Map Map Map Map Map Map Map Map
 
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 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
Sat
Sep 24
Sun
Sep 25
Aurora/Elgin
Good
Good
38 
Bloomington/Normal
Moderate
Good
90 
Champaign
Moderate
Good
49 
Chicago
Good
Good
80 
Decatur
Moderate
Good
90 
Joliet/Will County
Good
Good
80 
Lake County
Good
Good
38 
North & West Suburbs (Chicago)
Good
Good
40 
Peoria
Moderate
Good
57 
Rock Island-Moline
Good
Good
57 
Rockford
Good
Good
38 
South & West Suburbs (Chicago)
Good
Good
58 
Springfield
Moderate
Good
100 
St. Louis (Metro-east)
Unhealthy for Sensitive Groups
Moderate
108 
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.