Air Quality Index

Issued July 31, 2015 @ 04:22 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  43   38   PARTICULATES  GOOD  
CHICAGO  39   42   PARTICULATES  MODERATE  
SOUTH & WEST SUBURBS  39   39   OZONE  MODERATE  
NORTH & WEST SUBURBS  47   39   PARTICULATES  MODERATE  
AURORA-ELGIN  43   38   PARTICULATES  GOOD  
WILL COUNTY  58   57   PARTICULATES  GOOD  
ROCKFORD  43   38   PARTICULATES  GOOD  
QUAD CITIES  36   34   OZONE  GOOD  
PEORIA  36   37   OZONE  GOOD  
CHAMPAIGN/URBANA  29   36   OZONE  GOOD  
BLOOMINGTON/NORMAL  35   38   PARTICULATES  GOOD  
DECATUR  39   42   OZONE  GOOD  
SPRINGFIELD  37   39   OZONE  GOOD  
METRO EAST  40   47   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.