Air Quality Guide for PM2.5
|Air Quality||Health Effects Statement||Cautionary Statement|
|Air quality is satisfactory, and air pollution poses little or no risk.||None.|
|Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. (See below for sensitive groups.))||Unusually sensitive people should consider limiting prolonged outdoor exertion.|
| Unhealthy for Sensitive Groups
|Members of sensitive groups may experience health effects. The general public is less likely to be affected.||Sensitive groups should reduce prolonged or heavy outdoor exertion. Schedule outdoor activities in the morning when ozone is lower.|
|Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.||Sensitive groups should avoid prolonged or heavy outdoor exertion. Everyone else should reduce prolonged or heavy outdoor exertion.|
| Very Unhealthy
|Health alert: The risk of health effects is increased for everyone.||Sensitive groups should avoid all physical activity outdoors. Everyone else should avoid prolonged or heavy outdoor exertion.|
|Health warning of emergency conditions: Everyone is more likely to be affected.||Everyone should avoid all outdoor exertion.|
| Beyond Index
|Extremely High Levels: Avoid all physical activity outdoors.|
PM2.5: People with heart or lung disease, older adults, and children. For more information, click here.
Ozone: People with lung disease, children, older adults, and people who are active outdoors, including outdoor workers. For more information, click here.