AQI Range | Air Quality | Health Implications | Cautionary Statements |
---|---|---|---|
0-50 Good | Air quality is considered satisfactory, and air pollution poses little or no risk. | None | |
51-100 Moderate | Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. | Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors. | |
101-150 Unhealthy for Sensitive Groups | Members of sensitive groups may experience health effects. The general public is not likely to be affected. | Sensitive groups should reduce prolonged or heavy exertion outdoors. | |
151-200 Unhealthy | Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects. | Everyone should reduce prolonged or heavy exertion outdoors. | |
201-300 Very Unhealthy | Health alert: everyone may experience more serious health effects. | Everyone should avoid prolonged or heavy exertion outdoors. | |
301-500 Hazardous | Health warnings of emergency conditions. The entire population is more likely to be affected. | Everyone should avoid all outdoor exertion. |