Members of sensitive groups may experience health effects. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. AQI Basics for Ozone and Particle Pollution Daily AQI ColorĪir quality is satisfactory, and air pollution poses little or no risk.Īir quality is acceptable. The color makes it easy for people to quickly determine whether air quality is reaching unhealthy levels in their communities. Each category corresponds to a different level of health concern. When AQI values are above 100, air quality is unhealthy: at first for certain sensitive groups of people, then for everyone as AQI values get higher.
AQI values at or below 100 are generally thought of as satisfactory. For example, an AQI value of 50 or below represents good air quality, while an AQI value over 300 represents hazardous air quality.įor each pollutant an AQI value of 100 generally corresponds to an ambient air concentration that equals the level of the short-term national ambient air quality standard for protection of public health. The higher the AQI value, the greater the level of air pollution and the greater the health concern. Think of the AQI as a yardstick that runs from 0 to 500.
AQI is EPA’s index for reporting air quality.
