Regulation & law · 19/11/2009Updated: 10/17/2026 · 1 min read

EPA Approves Tennessee's Plan to Meet 1997 Ozone NAAQS Standards

The US Environmental Protection Agency (EPA) has proposed approving Tennessee's plan to redesignate the Shelby County portion of the Memphis, Tennessee-Arkansas 8-hour ozone nonattainment area to attainment, meeting the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS) standards, and approving the state's implementation plan revision containing a maintenance plan for the area.