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TMDL overview
Overview of TMDLs.
TMDL development
TMDLs in development.
TMDL approvals
USEPA approved TMDLs.
TMDL implementation
TMDL implementation.
Wastewater, storm water, CAFOs
TMDL Point source issues.
Nonpoint source
TMDL runoff stormwater issues.
TMDL map and projects
TMDL Map and projects.
Contact information
For more information on the Upper Fox and Wolf TMDL, contact:
Keith Marquardt
Upper Fox and Wolf TMDL project manager

Upper Fox and Wolf Total Maximum Daily Load (TMDL) A framework for water quality improvement

The Upper Fox River and Wolf River Basin, courtesy of Winnebago Waterways.

The Upper Fox and Wolf River Basins (UFW) are two separate basins that converge within a series of pool lakes in Winnebago County before finally flowing collectively into Lake Winnebago. All the surface water drainage to Lake Winnebago is contained within these two basins. Lake Winnebago outlets into the Lower Fox River Basin, where it eventually flows into Green Bay.

The DNR, together with many partners throughout the basins, are working to improve water quality within the Upper Fox and Wolf Rivers, which includes many lakes and tributaries. The Total Maximum Daily Load (TMDL) study and implementation plan will provide a strategic framework and prioritize resources for water quality improvement in the UFW.

The UFW TMDL study area spans Wisconsin's east central corridor from the headwaters in Forest County and the city of Portage to Lake Winnebago, covering 5,900 square miles, approximately 10 percent of the state.

The TMDL process pipeline

Approval by EPA

On February 27, 2020, the U.S. EPA approved the Upper Fox and Wolf TMDL Report.

Final TMDL Report (February 2020)

Map and spatial data viewer

Technical reports


Previous meetings

Photo of Winnebago shoreline, courtesy of Winnebago Waterways.

The Winnebago shoreline. © Winnebago Waterways

July 2018 stakeholder meeting

The DNR hosted an informational meeting on July 11, 2018, which outlined its efforts to reduce phosphorus and total suspended solid loads in waters throughout the basin.

Last revised: Tuesday March 03 2020