Storm Water Permits
In response to the 1987 Amendments to the Clean Water Act (CWA), the U.S. Environmental Protection Agency (EPA) developed Phase I of the NPDES Storm Water Program in 1990. Under Phase I, EPA required NPDES permit coverage for storm water discharges from:
- "Medium" and "large" municipal separate storm sewer systems (MS4s) located in incorporated places or counties with populations of 100,000 or more
- Eleven categories of industrial activity, one of which is construction activity that disturbs five or more acres of land.
This page contains information related to MS4s.
The following are already permitted Cities in Tennessee:
Tennessee Department of Transportation (TDOT) Municipal Separate Storm
Sewer System (MS4)
Permit Number TNS077585