EPA Air Quality Index

**Semantic type:** Intellectual Product

**Definition:** A nationally uniform color-coded index developed by EPA for reporting and forecasting daily air quality. The AQI reports the most common ambient air pollutants that are regulated under the Clean Air Act, including ozone and particle pollution. The AQI informs the public about air quality in the area, tells who may be affected, and provides steps to take to reduce exposure when pollution levels are unhealthy.

**Synonyms:** - AQI - Air Quality Index - Air Quality Index - Environmental Protection Agency (EPA) Air Quality Index