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Stormwater Management


The University of Tennessee Knoxville operates a Phase II Municipal Separate Storm Sewer System (MS4). The MS4 is governed by the State of Tennessee National Pollutant Discharge Elimination System (NPDES) permit. This permit is required by the Tennessee Department of Environment and Conservation as mandated by the Environmental Protection Agency under the Clean Water Act of 1972.

The primary goal of the MS4 is to improve and/or maintain the quality of surface waters by reducing the amount of pollutants in storm water as a result of continued urbanization. Polluted runoff is commonly transported through MS4s, from which it is often discharged untreated into local water bodies. To prevent harmful pollutants from being washed or dumped into an MS4, operators must obtain a NPDES permit and develop a Stormwater Management Plan which consists of six components.

The implementation and enforcement of these components, listed below, is collectively referred to as the Stormwater Management Plan.

  1. Public Education and Outreach
  2. Public Participation and Involvement
  3. Illicit Discharge Detection and Elimination
  4. Construction Site Stormwater Runoff Control
  5. Post-Construction Stormwater Management for New Development and Redevelopment
  6. Pollution Prevention and Good Housekeeping for University Operations

In order to achieve our Stormwater Management goals we work to maintain compliance with all applicable state and federal regulations regarding water resources, provide a regulatory framework to ensure our development has minimal impact on the environment,  promote low impact development to help protect our natural hydrologic cycle, manage our ever growing Stormwater Infrastructure, and engage our community through public participation and education outreach events.

Annual Report Public Review November 21, 2016

Who: University of Tennessee Stormwater Management

What: Annual Report Public Review

When: November 21, 2016 from 11 a.m. to 12 p.m.

Where: International House Board Room (Room Number 112)

Why: The UT Facilities Services Stormwater Management subunit continues to develop, implement and enforce a Stormwater Management Program (SWMP) to protect water quality, and to satisfy the appropriate water quality requirements of the Clean Water Act. Prior to submission of the annual report detailing the SWMP activities and overall program effectiveness, the public has the opportunity to review, ask questions and provide comments regarding the SWMP and 2016 Annual Report. The report can be found on the website at Stormwater.utk.edu under MS4 Annual Reports.

Your Campus. Your Water. Your opportunity to be inVOLved.





MS4 Annual Reports

How to Reduce Pollution in Stormwater Runoff

  • Dispose of waste properly
  • Place litter in proper containers
  • Never dump anything into a storm drain
  • Check vehicles for leaking fluids
  • Recycle used motor oil

What is Stormwater?

Stormwater is water runoff during and after a rain storm from streets, construction sites, parking lots, buildings and other areas that goes directly into storm drains and eventually into local streams and rivers. This water can pick up pollutants along the way to these streams and rivers. The University of Tennessee, Knoxville has set up a program that seeks to protect this water from pollutants.

Why are stormwater and sewer systems separate?

Stormwater systems are not treated at the waste water treatment facility. This water flows directly to the streams and rivers. Waste water (sewage) is sent to the waste water treatment facility and cleaned before it is released into the rivers.

Current Structural Best Management Practices (BMPs)

  • 8 cisterns, totaling approximately 111,000 gallons of captured and Stormwater to be reused for irrigation. Upon completion of the West Campus Housing Phase 1 this water will also be used to flush toilets and supply cold water for laundry
  • 18 water quality units total throughout campus designed to remove 80% of the Total Suspended Solids (TSS) present in Stormwater.
  • Oil water separators are located in the parking garages to filter out hydrocarbons.
  • 2 rain gardens are in operation at the Environmental and Landscape Lab and Biosystems Engineering and Soil Science (3100 square feet).
  • 37,400 sq. ft. of Permeable pavers serving as an alternative to paving services that allows Stormwater infiltrate instead of running off. On the pedestrian bridge the pavers also act as a detention to capture Stormwater and slow the rate of discharge.
  • 38 Bio-Retentions structures called Silva Cells are installed beneath street trees, which capture and retain Stormwater for uptake by the trees.
  • 2 Green Roofs have been installed covering 11,300 sq. ft.
  • 895 feet of Grassed Swale allow infiltration of Stormwater and reduce the peak discharge.
  • 7670 feet of vegetated filter strip which slows the overland flow and improves water quality prior to discharging into receiving waters.
  • 3 Dry detention basins/vaults used to slow the peak Stormwater discharge.