Air quality data for the current hour are unavailable.

No health impacts are expected when air quality is in this range.

Unusually sensitive people should consider limiting prolonged outdoor exertion.

Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.

Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion.

Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.

All children and adults should avoid or limit all outdoor exertion.