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Air Quality Information

Air Quality Index

Issued September 29, 2014 @ 03:31 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  69   70   PARTICULATES  GOOD  
CHICAGO  66   85   PARTICULATES  MODERATE  
SOUTH & WEST SUBURBS  71   81   PARTICULATES  MODERATE  
NORTH & WEST SUBURBS  69   79   PARTICULATES  MODERATE  
AURORA-ELGIN  69   70   PARTICULATES  GOOD  
WILL COUNTY  71   69   PARTICULATES  GOOD  
ROCKFORD  74   70   PARTICULATES  GOOD  
QUAD CITIES  52   61   PARTICULATES  GOOD  
PEORIA  52   61   PARTICULATES  GOOD  
CHAMPAIGN/URBANA  54   61   PARTICULATES  GOOD  
BLOOMINGTON/NORMAL  61   61   PARTICULATES  GOOD  
DECATUR  58   74   OZONE  GOOD  
SPRINGFIELD  54   61   PARTICULATES  GOOD  
METRO EAST  51   61   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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