Air Quality Index

Issued September 29, 2016 @ 03:38 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  27   30   OZONE  GOOD  
CHICAGO  39   32   PARTICULATES  GOOD  
SOUTH & WEST SUBURBS  31   30   OZONE  GOOD  
NORTH & WEST SUBURBS  38   32   OZONE  GOOD  
AURORA-ELGIN  25   28   OZONE  GOOD  
WILL COUNTY  27   31   OZONE  GOOD  
ROCKFORD  20   36   OZONE  GOOD  
QUAD CITIES  21   32   OZONE  GOOD  
PEORIA  21   31   OZONE  GOOD  
CHAMPAIGN/URBANA  18   34   OZONE  GOOD  
BLOOMINGTON/NORMAL  32   35   PARTICULATES  GOOD  
DECATUR  32   35   PARTICULATES  GOOD  
SPRINGFIELD  32   35   PARTICULATES  GOOD  
METRO EAST  22   22   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.