Air Quality Index

Issued March 04, 2015 @ 03:17 PM CST

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  47   39   PARTICULATES  GOOD  
CHICAGO  55   45   PARTICULATES  GOOD  
SOUTH & WEST SUBURBS  47   38   PARTICULATES  GOOD  
NORTH & WEST SUBURBS  53   39   PARTICULATES  GOOD  
AURORA-ELGIN  47   39   PARTICULATES  GOOD  
WILL COUNTY  48   33   OZONE  GOOD  
ROCKFORD  47   39   PARTICULATES  GOOD  
QUAD CITIES  54   36   OZONE  GOOD  
PEORIA  54   34   OZONE  GOOD  
CHAMPAIGN/URBANA  56   49   PARTICULATES  GOOD  
BLOOMINGTON/NORMAL  51   36   OZONE  GOOD  
DECATUR  51   29   OZONE  GOOD  
SPRINGFIELD  51   28   PARTICULATES  GOOD  
METRO EAST  26   31   OZONE  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.