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Air Quality Information

Air Quality Index

Issued April 23, 2014 @ 03:09 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  37   38   OZONE  GOOD  
CHICAGO  36   38   OZONE  MODERATE  
SOUTH & WEST SUBURBS  38   37   OZONE  MODERATE  
NORTH & WEST SUBURBS  39   37   OZONE  MODERATE  
AURORA-ELGIN  38   38   OZONE  GOOD  
WILL COUNTY  42   39   OZONE  GOOD  
ROCKFORD  42   40   OZONE  GOOD  
QUAD CITIES  41   34   OZONE  GOOD  
PEORIA  42   37   OZONE  MODERATE  
CHAMPAIGN/URBANA  38   37   OZONE  MODERATE  
BLOOMINGTON/NORMAL  42   41   OZONE  MODERATE  
DECATUR  43   38   OZONE  MODERATE  
SPRINGFIELD  35   37   OZONE  MODERATE  
METRO EAST  43   42   OZONE  MODERATE  

 

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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