Air Quality Index

Issued May 27, 2016 @ 03:21 PM CDT

Sector AQI Yesterday AQI Today Critical Pollutant Forecast Tomorrow
LAKE COUNTY  74   24   OZONE  MODERATE  
CHICAGO  71   41   OZONE  MODERATE  
SOUTH & WEST SUBURBS  67   41   OZONE  MODERATE  
NORTH & WEST SUBURBS  67   54   PARTICULATES  MODERATE  
AURORA-ELGIN  61   41   OZONE  MODERATE  
WILL COUNTY  67   41   OZONE  MODERATE  
ROCKFORD  64   40   OZONE  MODERATE  
QUAD CITIES  51   31   OZONE  MODERATE  
PEORIA  61   35   OZONE  MODERATE  
CHAMPAIGN/URBANA  47   40   OZONE  MODERATE  
BLOOMINGTON/NORMAL  51   37   OZONE  MODERATE  
DECATUR  45   37   PARTICULATES  MODERATE  
SPRINGFIELD  48   37   PARTICULATES  MODERATE  
METRO EAST  42   35   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.