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Lakes

It's easy to fall in love with Wisconsin's 15,000 lakes. The DNR partners with the University of Wisconsin - Extension and citizens around the state to help protect and maintain these amazing natural resources while providing some of the best recreational opportunities in the nation. More than 600 lake organizations and thousands of volunteers play a leadership role in the stewardship of Wisconsin's lakes.

Find a Lake

Lake Water Quality Data

Data including water clarity, temperature, dissolved oxygen and more are collected from Wisconsin lakes

Lake Maps

Review survey maps for lakes throughout the state

Aquatic Plants

Aquatic plants form the foundation of healthy and flourishing lake ecosystems

Aquatic Invasive Species

Learn more about our efforts to prevent, contain and control unwanted species in our waterways

FAQ

Answers to frequently asked questions about lakes

Lake Shoreland Habitat

View lake shoreland habitat disturbance and read habitat protection and restoration suggestions
Lake Shoreland Habitat

Lake Levels

View and graph lake level data across Wisconsin
Lake Levels

Surface Water Grants

Learn about grants for lake/river planning and implementation and for aquatic invasive species prevention and control
Surface Water Grants

Clean Boats, Clean Waters

Clean Boats, Clean Waters inspectors are a front line defense against the spread of aquatic invasive species
Clean Boats, Clean Waters

Citizen Lake Monitoring Network

The Citizen Lake Monitoring Network (CLMN) creates a bond between over 1,000 citizen volunteers statewide and the DNR
Citizen Lake Monitoring Network

Blue-Green Algae

The DNR is working hard to protect humans, domestic animals and wildlife from harmful algal blooms
Blue-Green Algae

Waterways and Wetlands Contacts

Staff to contact with questions about rip rap and erosion control, installation of piers/docks/ramps, dredging, etc.
Waterways and Wetlands Contacts

Lakes & Aquatic Invasive Species Mapping Tool

View the geographical distribution of invasive plants, fish and invertebrates, map monitoring locations and more
Lakes & Aquatic Invasive Species Mapping Tool