Tennessee's Total Maximum Daily Load (TMDL) Program


Section 303(d) of the Clean Water Act requires states to develop TMDLs for those waterbodies not attaining water quality standards. The objective of a TMDL is to allocate loads among all of the known pollutants sources throughout a watershed so that appropriate control measures can be implemented and water quality standards can be achieved.

The TMDL process quantifies the amount of a pollutant that can be assimilated in a waterbody, identifies the sources of the pollutant, and recommends regulatory or other actions to be taken to achieve compliance with applicable water quality standards based on the relationship between pollution sources and instream water quality conditions. A TMDL can be expressed as the sum of all point source loads (waste load allocations), nonpoint source loads (load allocations) and an appropriate margin of safety, and is represented by this relationship:

TMDL = Sum of Point Sources + Sum of Nonpoint Sources + Margin of Safety

More information is available on the EPA web site.

Proposed TMDLs

None at this time. 

↑Comments on any above proposed TMDL reports may be submitted through the indicated dates, directly via our WEB FORM, or in writing to the address provided in the public notice document. ↑ 

If you would like to receive a notification e-mail when a TMDL is placed on public notice, please e-mail Regan.McGahen@tn.gov to be added to our e-mail distribution list.

EPA Approved TMDLs

Search for EPA-reviewed and approved TMDLs.  

Richard Cochran
Watershed Planning Unit Manager

This Page Last Updated: July 9, 2024 at 6:31 PM