Stormwater Management

Williamson County will be hosting a stream clean up on a section of the Harpeth River on May 26, 2017. Volunteers will meet at 8:30 at the put in location, and a shuttle will be provided at the take out location. The area of focus will be from Del Rio Pike to Old Natchez Trace. Read the Itinerary here.


Williamson County has developed a program to manage the quality of stormwater runoff from the stormwater drainage system. The program will focus on the following:
  • Construction site stormwater runoff control
  • Good housekeeping for county operations
  • Illicit discharge detection and elimination
  • Pollution prevention for county operations
  • Post-construction stormwater management
  • Public education and outreach
  • Public involvement / participation

Williamson County is one of more than 85 Tennessee communities that submitted a Notice of Intent (NOI) application to the Tennessee Department of Environment and Conservation (TDEC) for coverage under the Tennessee Phase II MS4 general storm water permit. 
Read more about new plan review stormwater requirements and approval process.