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Air Quality Information

Air Quality Index

Issued October 24, 2014 @ 03:14 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  48   46   PARTICULATES  GOOD  
CHICAGO  52   58   PARTICULATES  GOOD  
SOUTH & WEST SUBURBS  37   28   NITROGEN DIOXIDE  GOOD  
NORTH & WEST SUBURBS  53   46   PARTICULATES  GOOD  
AURORA-ELGIN  48   46   PARTICULATES  GOOD  
WILL COUNTY  44   55   PARTICULATES  GOOD  
ROCKFORD  48   46   PARTICULATES  GOOD  
QUAD CITIES  38   63   PARTICULATES  GOOD  
PEORIA  38   63   PARTICULATES  GOOD  
CHAMPAIGN/URBANA  31   36   PARTICULATES  GOOD  
BLOOMINGTON/NORMAL  31   36   PARTICULATES  GOOD  
DECATUR  37   36   PARTICULATES  GOOD  
SPRINGFIELD  31   36   PARTICULATES  GOOD  
METRO EAST  44   55   PARTICULATES  GOOD  

 

Descriptor Category Color Codes
Good 0-50 Unhealthy 151-200
Moderate 51-100 Very Unhealthy 201-300
Unhealthy for Sensitive Groups 101-150 Hazardous 301-500

 

AQI Ranges and Descriptor Categories Health Effects Cautionary Statements
0 - 50 Good    
51 - 100 Moderate    
101 - 150 Unhealthy for Sensitive Groups Increased liklihood of respiratory symptoms and breathing discomfort in sensitive groups. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor activity.
151 - 200 Unhealthy Greater liklihood of respiratory symptoms and breathing difficulty in sensitive groups. Active children and adults, and people with respiratory disease, such as asthma, should avoid heavy outdoor exertion; everyone else, especially children, should limit heavy outdoor exertion.
201 - 300 Very Unhealthy Increasingly severe symptoms and impaired breathing likely in sensitive groups. Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
301 - 500 Hazardous Severe respiratory effects and impaired breathing likely in sensitive groups. Everyone should avoid all outdoor exertion.

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