Page Banner

Watershed Evaluation and Total Maximum Daily Loads (TMDL) Section

News and Announcements

The Department of Environmental Protection announces a public meeting beginning at 2:30 p.m. EST on Dec. 7, 2022 to receive comments on the total maximum daily load (TMDL) development two-year work plan. Aligning with the statewide biennial assessment, the proposed two-year work plan is guided by the TMDL prioritization framework for the next decade. The department is requesting that all comments be received by Dec. 21, 2022.  All comments on the TMDL development two-year work plan and the specific list of waters proposed for TMDL development should be submitted by email to .   

Meeting Information



TMDL Prioritization 2.0

Dec. 7, 2022 2:30 PM EST


Webinar Registration


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. Waterbodies 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 waterbody.

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, 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:
  • Implement the strategies and actions in the BMAP.
  • Measure the effectiveness of the BMAP, both continuously at the local level and through a formal re-evaluation every five years.
  • Adapt-change the plan and change the actions if things aren't working.
  • 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

Last Modified:
October 12, 2023 - 4:18pm

Some content on this site is saved in an alternative format. The following icons link to free Reader/Viewer software:
PDF: | Word: | Excel: