To Health home page

Pollen and Mold Center
What Do The Color Codes Mean?


Color Interpretation
Green Good air quality.
Yellow Moderate air quality.
Orange

Unhealthy for sensitive individuals. High levels of ozone air pollution exists and levels may exceed health-based standards. Sensitive individuals should limit prolonged moderate exertion outdoors.

Red

Unhealthy for everyone. High levels of ozone air pollution exists and levels may exceed health-based standards. Everyone should limit prolonged moderate exertion outdoors.

Purple

Very unhealthy for everyone. High levels of ozone air pollution exists and levels may exceed health-based standards. Everyone should avoid prolonged moderate exertion outdoors.