Green
Good | Yellow
Moderate
Unusually sensitive people should consider limiting prolonged outdoor exertion. | Orange
Unhealthy for
Sensitive Groups
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. | Red
Unhealthy Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged exertion. Everyone else, especially children, should limit prolonged outdoor exertion. | Purple
Very Unhealthy! Active children and adults, and people with respiratory disease, such as asthma, should avoid all exertion. Everyone else, especially children, should limit prolonged outdoor exertion. |
