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Total Maximum Daily Loads (TMDL) Program

News & Announcements

New! The department announces a public meeting to receive public comments on draft nutrient total maximum daily loads (TMDLs) for impaired waters in the Kissimmee River Basin, to be adopted in Rule 62-304.515, F.A.C on June 7, 2018, 10:00 a.m. (Highlands County Engineering Department, 505 S. Commerce Ave, Sebring, Florida 33870) . The draft TMDLs to be presented at the public workshop are for Lake Persimmon (WBID 1938E). The department will accept written comments on the draft TMDLs, as well as the establishment of these nutrient TMDLs as site specific interpretations of the narrative nutrient criterion, through June 14, 2018. Written comments should be directed to Erin Rasnake, Program Administrator, Watershed Evaluation and TMDL Section, Florida Department of Environmental Protection, Mail Station 3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, .
New! The public is invited to an June 29th, 2018 public hearing on the Total Maximum Daily Loads (TMDLs) rules, and their allocations, for certain waters impaired for nutrients in the Peace River Basin (62-304.625). Furthermore, in accordance with paragraph 62-302.531(2)(a), F.A.C., the nutrient TMDLs for Lake Haines, Lake Rochelle, Lake Conine, Lake Alfred, Lake Blue, Lake Marianna, Lake Ariana, Eagle Lake, and Lake Hollingsworth will constitute site specific numeric interpretations of the narrative nutrient criterion set forth in paragraph 62-302.530(48)(b), F.A.C., that will supersede the otherwise applicable numeric nutrient criteria in subsection 62-302.531(2), F.A.C., for these surface water segments. Written comments should be directed to: Erin Rasnake, Program Administrator, Water Quality Evaluation and TMDL Program, Florida Department of Environmental Protection, Mail Station #3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400 via post or email:


Meeting Information


Lake Persimmon (WBID 1938E) June 7, 2018 10:00 a.m.
(Meeting Agenda)
Highlands County Engineering Department
505 S. Commerce Ave
Sebring, Florida 33870
Peace River Basins June 29, 2018
2:00 PM
(Hearing Agenda)
Florida Department of Environmental Protection  
Bob Martinez Center Room 609
2600 Blair Stone Road
Tallahassee, FL 32399-2400

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 (TMDL) is the heart of this comprehensive approach.

Locations of the department'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 Erin Rasnake at, 850-245-8338, or Janis Morrow at, 850-245-8543.

Last Modified:
May 11, 2018 - 1:55pm

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