Air Quality Guide
Air Quality | Health Effects Statement | Cautionary Statement |
Good (0-50) | Air quality is satisfactory, and air pollution poses little or no risk. | None. |
Moderate (51-100) | Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. | Unusually sensitive people should consider limiting prolonged outdoor exertion. |
Unhealthy for Sensitive Groups (101-150) | 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.
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Unhealthy (151-200) | 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 (201-300) | 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. |
Hazardous (301-500) | Health warning of emergency conditions: Everyone is more likely to be affected. | Everyone should avoid all outdoor exertion. |
Unavailable | When data is marked as unavailable, current values may be unavailable for a variety of reasons related to communications, monitoring equipment status, and other circumstantial events. |
Additional Information
For more information, please visit https://www.airnow.gov/aqi/.