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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.

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Contact information
For information on the Wisconsin River Basin TMDL, contact:
Pat Oldenburg
Wisconsin River TMDL project manager

Wisconsin River Total Maximum Daily Load (TMDL) A framework for water quality improvement

The Wisconsin River

The DNR, together with many partners throughout the basin, are working to improve water quality of the Wisconsin River, its reservoirs and tributaries. The Total Maximum Daily Load (TMDL) study will provide a strategic framework and prioritize resources for water quality improvement in the Wisconsin River Basin.

The Wisconsin River TMDL study area spans Wisconsin's central corridor from the headwaters in Vilas County to Lake Wisconsin in Columbia County, covering 9,156 square miles (approximately 15 percent of the state).

Approval by EPA

The U.S. EPA approved the Wisconsin River TMDL on April 26, 2019.

Report downloads

Final Approved Report
Wisconsin River Basin TMDL (April 2019) [PDF]
GIS Data
GIS Data including CAFOs, MS4s, Wastewater Outfalls and Subbasins [ZIP]
Appendix A – Tributary Information and Charts [PDF]
Appendix B – Lakes Requiring Additional Evaluation [PDF]
Appendix C – Site-Specific Criteria Analysis [PDF]
Appendix D – Watershed Modeling Documentation [PDF]
Appendix E – Sediment Monitoring [PDF]
Appendix F – Baseline Load [PDF]
Appendix G – MS4 Detail Maps [PDF]
Appendix H – Total Phosphorus Loading Capacity of Petenwell and Castle Rock Flowages [PDF]
Appendix I – BATHTUB and Empirical Lake Models [PDF]
Appendix J – Allocations [PDF]
Appendix K – Proposed Site-Specific Criteria Allocations [PDF]
Appendix L – Watershed Implementation Activities [PDF]
Appendix M – CE-QUAL-W2 Reservoir Model [PDF]
Appendix N – Agricultural Targets [PDF]
Appendix O – Trading and Adaptive Management Information [PDF]
Appendix P – Response To Preliminary Comments (February 21 to April 23, 2018 comment period) [PDF]
Appendix Q – Public Hearing Comments (August 20 through September 19, 2018 comment period) [PDF]
Appendix R – Response to Public Hearing Comments (August 20 through September 19, 2018 comment period) [PDF]

August 2018 public hearing

The DNR hosted a public informational hearing on August 22, 2018, at the Portage County Courthouse Annex Building in Stevens Point and accepted written comments through September 19, 2018.

February 2018 informational webinar and meetings

The DNR hosted an informational webinar on February 21, 2018, which kicked off a series of informational meetings to outline its efforts to reduce phosphorus loads in waters throughout the basin. The same content was presented at each meeting.

The Feb. 21, 2018, webinar provided an overview of the TMDL study and the supporting report.

On March 5, 6 and 14, 2018, the DNR hosted informational meetings providing an overview of the TMDL study and soliciting public input.

Overview of the project

A canoe and dog along the Wisconsin River

Map and spatial data viewer

Technical project details

Presentations and e-library

Last revised:Friday December 20 2019