The Air Quality Index (AQI) is a color-coded tool for reporting daily air quality. It provides simple information on local air quality, the health concerns for different levels of air pollution, and how you can protect your health when pollutants reach unhealthy levels.
Air Quality Index Table
Levels of Health Concern
Air quality is considered satisfactory. Air pollution poses little or no risk
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
People with heart and lung disease, older adults, and children are at greater risk from air pollution.
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects
Health Alert: everyone may experience more serious health effects.
Health warnings of emergency conditions. The entire population is more likely to be affected.