Air Quality 
Index Levels
What Can You Do?
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No action required. A good day for outdoor exercise! 
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 
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
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. 
Health warnings of emergency conditions.