Regulation & law · 14/11/2005Updated: 10/17/2026 · 1 min read

EPA Approves Indiana's Ozone Redesignation Requests for Greene and Jackson Counties

The U.S. Environmental Protection Agency (EPA) has approved Indiana's requests to redesignate two counties, Greene County and Jackson County, as having met the 8-hour ozone National Ambient Air Quality Standard (NAAQS). This decision is based on three years of air quality monitoring data and will allow the state to maintain the standard through 2015.