Residents
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Water Quality Modeling Tools
Water quality modeling tools can be used to better understand and evaluate the impacts of management decisions on Wisconsin's surface waters. Each model was developed for a specific purpose and requires an understanding of the inputs, outputs and…
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Wisconsin’s Consolidated Assessment and Listing Methodology (WisCALM)
Every two years, Sections 303(d) and 305(b) of the Clean Water Act require states to publish a list of all waters not meeting water quality standards and an overall report on surface water quality status of all waters in the state. To assess surface…
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Water Quality Criteria
The Clean Water Act requires states to adopt water quality standards to protect aquatic life, wildlife and recreation. Water quality standards consist of three components: antidegradation, designated uses and water quality criteria. Water quality…
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Triennial Standards Review
Final 2025-2027 Triennial Standards Review Workplan Now AvailableThe final work plan, 2025-2027 Triennial Standards Review (TSR) Priorities for the Water Quality Standards Program, is available for download.
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Surface Water Integrated Monitoring System (SWIMS) Database
Subscribe for updates about the SWIMS system The Surface Water Integrated Monitoring System (SWIMS) is a DNR system that holds chemistry (water, sediment, fish tissue) data, physical data, biological (macroinvertebrate, aquatic invasives) data…
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Water Quality Standards Rule Updates
The DNR is conducting rulemaking on several topics related to surface water quality standards, outlined below.
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Office of Great Waters Staff Contacts
Staff in the DNR’s Office of Great Waters collaborate with federal, state and local agencies; tribes; businesses; citizen-led organizations and community members to protect and improve the environmental quality of the Great Lakes and Mississippi…
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Wisconsin's Great Lakes Strategy
The Great Lakes contain 20% of the world's available fresh surface water supply. Because of that, the Great Lakes are critical to the health and welfare of all the Great Lakes states. Effective management of both wetland and water quantity and…
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Sheboygan River Area of Concern
About About the Sheboygan River AOC In 1987, the Sheboygan River was designated as one of 43 Great Lakes Areas of Concern (AOC) – areas that are severely degraded and fail to support aquatic life beneficial for human use (like fish and…
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Great Lakes Restoration Initiative (GLRI)
The Great Lakes Restoration Initiative (GLRI) [exit DNR] is a federal program that provides unprecedented funding for protection and restoration efforts on the five Great Lakes. The GLRI is guided by an action plan with detailed performance goals…