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Air Quality Information

Air Quality Index

Issued August 21, 2014 @ 04:19 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  42   30   PARTICULATES  MODERATE  
CHICAGO  51   45   PARTICULATES  MODERATE  
SOUTH & WEST SUBURBS  56   59   PARTICULATES  MODERATE  
NORTH & WEST SUBURBS  39   30   PARTICULATES  MODERATE  
AURORA-ELGIN  38   30   PARTICULATES  MODERATE  
WILL COUNTY  36   27   OZONE  MODERATE  
ROCKFORD  40   30   PARTICULATES  MODERATE  
QUAD CITIES  41   59   PARTICULATES  MODERATE  
PEORIA  41   59   PARTICULATES  MODERATE  
CHAMPAIGN/URBANA  25   58   PARTICULATES  MODERATE  
BLOOMINGTON/NORMAL  36   58   PARTICULATES  MODERATE  
DECATUR  29   58   PARTICULATES  MODERATE  
SPRINGFIELD  36   58   PARTICULATES  MODERATE  
METRO EAST  41   55   PARTICULATES  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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