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WI Natural Resources Board January 2019

This agenda item provides an overview of the Total Maximum Daily Load (TMDL) for the Wisconsin River Basin, which is a restoration plan mandated by the Clean Water Act. The TMDL sets pollution reduction goals for both point sources and non-point sources to protect public health, recreation, and aquatic life. Existing rules, permit programs, and voluntary actions are used for implementation. The TMDL document has undergone public participation and is awaiting approval.

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WI Natural Resources Board January 2019

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  1. WI Natural Resources BoardJanuary 2019 Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

  2. Wisconsin River Basin TMDL Total Maximum Daily Load = Restoration Plan

  3. TMDL Overview • Clean Water Act required • State water quality standards set the goal • Protect public health, recreation, aquatic life • TMDL is the pollution “budget” for both point sources and non-point sources Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

  4. TMDL Overview • TMDLs do not create new regulatory requirements but rather rely on existing rules and permit programs for implementation. • Needed point source reductions are implemented through the WPDES permit program. • Non-point source reductions are implemented through: • State required prohibitions and performance standards to reduce runoff (NR 151) • Voluntary, incentive-based actions (various federal and state cost-share and grants are available) • Farmer-led initiatives • County and watershed conservation plans Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

  5. WI River TMDL • 2009 Legislation and appropriation directed DNR to conduct WI River TMDL Study. • 15% of Wisconsin: • 110 river/stream segments and 38 lakes listed as impaired. • 108 permitted wastewater facilities • Science-based: extensive monitoring, cutting edge modeling • Submitted to USEPA for approval in December 2018 Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

  6. Public Participation • Met w/agricultural groups, watershed groups and permit holders to participate in TMDL development. • Held 3 preliminary informational meetings and comment period in March/April 2018. • Worked with individual WPDES permittees to understand impact and options • Held official public informational hearing and comment period in August/September 2018. Response to comments in TMDL document Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

  7. Next Steps • Submitted TDML to EPA in December. 90 day review period. • TMDL includes proposed Site Specific Criteria for three lakes: Castle Rock, Petenwell and Lake Wisconsin (scope approved by NRB at June 2018 meeting). • Once approved, begin working with permitted facilities to discuss compliance options as load allocations are incorporated into permits as they expire over next 5 years. • Compliance options include water quality trading, adaptive management and variance options. • Agricultural non-point sources can utilize edge-of-field targets to compare to current practices—can be a trading partner, AM plan partner Agenda Item 4A1 Marcia Willhite (Water Evaluation Section Chief)

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