Air Quality 
Index Levels
What Can You Do?
(For more detailed information, visit www.airnow.gov)
Good 
(0-50)
No action required. A good day for outdoor exercise! 
Moderate 
(51-100)
Some people are unusually sensitive to air pollution. If you are one of them, take steps to reduce prolonged or heavy exertion outdoors
Unhealthy for Sensitive 
Groups 
(101-150)
Itís still OK to exercise outdoors, but if youíre in a sensitive group, take steps to reduce prolonged or heavy exertion. Examples: Take a walk instead of a run; weed the garden instead of doing heavier chores like spreading mulch, or exercise when air quality is better
Unhealthy 
(151-200)
Air quality is unhealthy for everyone. Sensitive groups should avoid prolonged or heavy exertion outdoors Ė a good day to work out at the gym! Everyone should take steps to reduce outdoor exertion. 
Very Unhealthy (201-300) Health alert: Sensitive groups should avoid all outdoor exertion. Everyone else should limit it. 
Hazardous 
(301-500)
Health warnings of emergency conditions.