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Total Maximum Daily Loads (TMDLs)

Impaired waters in Wisconsin are largely addressed through an analysis known as a Total Maximum Daily Load (TMDL). A TMDL is the amount of a pollutant a waterbody can receive and still meet water quality standards. While some waters may be restored through alternative projects such as watershed restoration plans, many issues are addressed through TMDLs.

TMDL Overview

Learn the basics about TMDLs.

Approved TMDLs

TMDLs from around the state that have been approved by the DNR and the EPA.

Status Map

View a statewide map depicting TMDLs in varying states of development, approval or implementation.