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Total Maximum Daily Loads (TMDL) Program

News & Announcements

New!  The public is invited to attend a technical workshop on November 20, 2019, at 1:30 p.m. in Havana, Florida for Total Maximum Daily Loads (TMDLs) in the Ochlockonee  River Basin. This public technical workshop will provide an opportunity for the department to present and respond to any public comments about the updated model set that will be used in the development of the Lake Talquin nutrient TMDLs, and outline the next steps in the TMDL development.  The department is requesting that all written comments should be directed to: Erin Rasnake, Program Administrator, Florida Department of Environmental Protection, MS 3555, 2600 Blair Stone Road, Tallahassee, Florida 32399-2400 or via email: by December 6, 2019. 
New!  The public is invited to attend a hearing on December 16, 2019, at 2:00 p.m. in Tallahassee, Florida. The department will present Total Maximum Daily Loads (TMDLs) for certain waters impaired for nutrients in the Middle St. Johns River Basin TMDLs (62-304.505 F.A.C.), Kissimmee River Basin TMDLs (62-304.515 F.A.C.), Peace River Basin TMDLs (62-304.625 F.A.C.) and Withlacoochee Basin TMDLs (62-304.640 F.A.C.), specifically, nutrient TMDLs for Bethel Lake, Lake Gem, Reedy Lake, Lake Ida, Hickory Lake, Lake Clinch, Lake Adelaide, Lake McLeod, and Lake Agnes. The person to be contacted regarding the proposed rules is: Erin Rasnake, at 2600 Blair Stone Road, MS 3555, Tallahassee, FL 32399-2400, email:
TMDL Meeting Information Location
Ochlockonee River Basin: Lake Talquin nutrient TMDLs
November 20, 2019, 1:30 p.m. 

(Meeting Agenda ; Model Set )
Northwest Florida Water Management District
Governing Board Room
81 Water Management Drive
Havana, FL 32333
Middle St. Johns River Basin: (Lakes Bethel and Gem)
Kissimmee River Basin: (Lakes Reedy, Ida, Hickory, Clinch, Adelaide)
Peace River Basin: (Lake McLeod)
Withlacoochee Basin: (Lake Agnes)
December 16, 2019, 2:00 p.m.
Florida Department of Environmental Protection
Bob Martinez Center Room 176
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:
October 23, 2019 - 3:19pm

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