Air Quality Guide for 24 hour Average Particulate Matter Pollution (PM2.5)

Air Quality Index
PM2.5 (µg/m3)

Health Concern

Good
(0-12.0)

None

Moderate
(12.1-35.4)

Unusually sensitive people should consider reducing prolonged or heavy exertion

Unhealthy for Sensitive Groups
(35.5-55.4)

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

Unhealthy
(55.5-150.4)

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
(150.5+)

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