Energy & environment · 04/01/2010Updated: 10/17/2026 · 1 min read

EPA Approves Tennessee's Request to Redesignate Memphis Area to Attainment

The US Environmental Protection Agency (EPA) has approved Tennessee's request to redesignate the Memphis, Tennessee-Arkansas 8-hour ozone nonattainment area to attainment, meeting the 1997 8-hour ozone national ambient air quality standards (NAAQS). The approval is based on the area's attainment of the ozone standard and the implementation of a revised state plan.