Governing Law and Regulations
National Pollutant Discharge Elimination System (NPDES) permits: Rules and Regulations of the State of Tennessee (Rule) 0400-40-10-.1 to 0400-40-10-.3
Tennessee Department of Environment and Conservation (TDEC) Division of Water Resources
U.S. Environmental Protection Agency (EPA) Region 4
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Tennessee is fully authorized by the U.S. Environmental Protection Agency (EPA) to administer the National Pollutant Discharge Elimination System (NPDES) program, including permit authority for stormwater discharges associated with municipal separate storm sewer systems (MS4s).
The state issues both individual and general permits for stormwater discharges from MS4s. See the national section STORMWATER—MUNICIPALITIES for more information about the federal MS4 stormwater permitting program.
• Administration and enforcement. TDEC's Division of Water Resources is responsible for the administration and enforcement of the stormwater discharge permit regulations for MS4s in Tennessee.
Under Phase I of the federal NPDES stormwater permitting program, the EPA required NPDES permit coverage for stormwater discharges from medium and large MS4s located in cities or counties with populations of 100,000 or more.
EPA's Phase II final rule requires NPDES permit coverage for stormwater discharges from approximately 85 cities and counties with small MS4s in Tennessee. The small MS4s are required to obtain coverage under a stormwater discharge permit and to implement a set of programs to manage the quality ...