Air Quality Index

Issued November 16, 2016 @ 01:23 PM CST

Sector	AQI Yesterday	AQI Today	Critical Pollutant	Forecast Tomorrow
Illinois AQI	This page has moved.	Please see Airnow.gov for AQI information.	https://www.airnow.gov/index.cfm?action=airnow.local_state&stateid=14&mapcenter=0&tabs=0

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.