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Total Maximum Daily Loads (TMDL) Program

News and Announcements

New! The Florida Department of Environmental Protection announces a public workshop beginning at 2:00 p.m. on October 13, 2021 to receive comments on the draft TMDL for Lake Talquin.  Supporting documentation including the Final model files are available on the Department’s FTP site here.  The workshop is scheduled for October 13, 2021, at 2:00 pm at the Douglas Building, 3900 Commonwealth Blvd., Room 137, Tallahassee, Florida. The Department will accept written comments on the draft TMDLs through October 22, 2021. Written comments should be directed to: Ansel Bubel, Mail Station #3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, email:

New! The department announces a public workshop to present and receive public comments on the draft total maximum daily load (TMDL) for impaired waters in the Middle St. Johns River Basin, to be adopted in Rule 62-304.505, F.A.C. The draft TMDLS to be presented at the public workshop include Kasey Lake (WBID 3002Q), Lake Fairhope (WBID 3004R), and Lake Lotta (WBID 3002G). The workshop is scheduled for Sept. 30, 2021,9:00 a.m. via webinarThe department is requesting that all comments be received by Oct. 8th, 2021. Written comments on the TMDL approach should be submitted by email to

TMDL Meeting Information Location

Middle St. Johns River Basin: Kasey Lake (WBID 3002Q), Lake Fairhope (WBID 3004R), and Lake Lotta (WBID 3002G) 

9:00 am Sept.30, 2021


Lake Talquin 2:00 p.m. on October 13, 2021 Douglas Building
3900 Commonwealth Blvd.
Room 137
Tallahassee, Florida

What is a TMDL? 

A TMDL is a scientific determination of the maximum amount of a given pollutant that a surface water can absorb and still meet the water quality standards that protect human health and aquatic life. Water bodies that do not meet water quality standards are identified as "impaired" for the particular pollutants of concern - nutrients, bacteria, mercury, etc. - and TMDLs must be developed, adopted and implemented to reduce those pollutants and clean up the water body.

The threshold limits on pollutants in surface waters - Florida's surface water quality standards on which TMDLs are based - are set forth primarily in rule 62-302, Florida Administrative Code (F.A.C.), and the associated table of water quality criteria.

What are the basic steps in the TMDL program? How does it work?

  1. Assess the quality of surface waters-are they meeting water quality standards? (Surface Water Quality Standards - Chapter 62-302)
  2. Determine which waters are impaired-that is, which ones are not meeting water quality standards for a particular pollutant or pollutants. (Impaired Waters Rule (IWR) - Chapter 62-303)
  3. Establish and adopt, by rule, a TMDL for each impaired water for the pollutants of concern-the ones causing the water quality problems.  (TMDLs - Chapter 62-304)
  4. Develop, with extensive local stakeholder input, Basin Management Action Plans (BMAPs) that....
  5. Implement the strategies and actions in the BMAP
  6. Measure the effectiveness of the BMAP, both continuously at the local level and through a formal re-evaluation every five years.
  7. Adapt-change the plan and change the actions if things aren't working
  8. Reassess the quality of surface waters continuously

We are working on a more comprehensive approach to protecting Florida water quality involving basin-wide assessments and the application of a full range of regulatory and non-regulatory strategies to reduce pollution. The Total Maximum Daily Load is the heart of this comprehensive approach.

Locations of the DEP's Adopted TMDLs

For locations of TMDLs in Florida, please view our interactive TMDL map and  Status of TMDLs in Florida documents (State Rule 62-304, F.A.C.).

Please help us improve our service by providing feedback on what you think of our adopted TMDL document, whether it is useful, and how could we make it better. Please contact Ken Weaver at 850-245-8414, or Janis Morrow at Janis Morrow, 850-245-8543.

Last Modified:
September 23, 2021 - 1:54pm

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