Knox County Tennessee

What is the Knox County’s National Pollution Discharge Elimination System Requirements?

Knox County Stormwater

Municipal Separate Storm Sewer System:  As a Phase II MS4 community, Knox County is charged with reducing the discharge of stormwater pollutants to the maximum extent practicable, to protect water quality, and to satisfy the appropriate water quality requirements of the Clean Water Act.

6-minimum measures:  In order to meet these aims, EPA has defined six “minimum control measures” (MCMs) that are to be addressed. Each of these requirements satisfies a portion of the Knox County Phase II NPDES Permit requirements.

The Tennessee Department of Environment and Conservation (TDEC):  TDEC implements the Phase II regulations in Tennessee. Knox County issued our Notice of Intent (NOI) to comply with this permit in 2003. Knox County was issued the most recent NPDES General Permit for Discharges from Small Municipal Separate Storm Sewer Systems in August of 2022. The current permit expires on August 31, 2027, at which point we will submit our NOI for the next 5-year permit cycle that begins in 2015. For a current list of the MS4 communities in Tennessee, click here