AQI Info

AQI
Levels of Health Concern

Numerical
Value

Meaning

Good

0-50

Air quality is considered satisfactory, and air pollution poses little or no risk.

Moderate

51-100

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.

Unhealthy for
Sensitive Groups

101-150

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Unhealthy

151-200

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Very Unhealthy

201-300

Health alert: everyone may experience more serious health effects.

Hazardous

> 300

Health warnings of emergency conditions. The entire population is more likely to be affected.