Air Quality Guide for 8 hour Average Ozone (O3)

Air Quality Index
(ppb)

Health Concern

Good
(0-54)

None

Moderate
(55-70)

Unusually sensitive people should consider reducing prolonged or heavy exertion

Unhealthy for Sensitive Groups
(71-85)

People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion.

Unhealthy
(86-105)

People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion. Everyone else should reduce prolonged or heavy exertion.

Very Unhealthy
106+

People with heart or lung disease, older adults, and children should avoid all physical activity outdoors. Everyone else should avoid prolonged or heavy exertion.