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Total Maximum Daily Loads (TMDL) Program

News and Announcements

New! The department announces a public meeting to present and receive public comments on the draft total maximum daily load (TMDL) for the nutrient impairment of Lake Istokpoga (WBID 1856B), in the Kissimmee River Basin, to be adopted in Rule 62-304.515, F.A.C. The meeting is scheduled for July 22, 2021, 10:00 a.m. via both in-person meeting and webinar. The draft TMDL document for these impaired waters is available on the department’s TMDL website, and will be provided upon request to interested parties by mail or via e-mail distribution. 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 criteria, through July 29, 2021. Written comments should be directed to: Ansel Bubel, Mail Station #3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, email:

New! The public is invited to attend a technical meeting on the development of total maximum daily loads (TMDLs) for Pine Lake and Lake Osborne in the Lake Worth Lagoon Basin. The meeting will provide an opportunity for the department to present the modeling approach to be used for development of TMDLs and to obtain input from stakeholders. The meeting is scheduled for August 26, 2021,11:00 a.m. via both in-person meeting and webinar Written comments on the TMDL modeling approach should be received by September 10, 2021 and can be directed to: James Albright, Watershed Evaluation and TMDL Section, Florida Department of Environmental Protection, Mail Station #3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400, or via email: A copy of the meeting agenda can be obtained by clicking here

TMDL Meeting Information Location

Lake Worth Lagoon Basin: Pine Lake and Lake Osborne

11:00 am, August 26, 2021

Greenacres Branch Library, 3750 Jog Road, Greenacres, FL 33467



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:
July 23, 2021 - 3:26pm

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