Daily AQI Color | Levels of Concern | Values of Index | Description of Air Quality |
Green | Good | 0 to 50 | Air quality is satisfactory, and air pollution poses little or no risk. |
Yellow | Moderate | 51 to 100 | Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. |
Orange | Unhealthy for Sensitive Groups | 101 to 150 | Members of sensitive groups may experience health effects. The general public is less likely to be affected. |
Red | Unhealthy | 151 to 200 | Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. |
Purple | Very Unhealthy | 201 to 300 | Health alert: The risk of health effects is increased for everyone. |
Maroon | Hazardous | 301 and higher | Health warning of emergency conditions: everyone is more likely to be affected. |