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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.

Lakes Topics A-Z

Find a Lake

Lake Maps

Review survey maps for lakes throughout the state.

Aquatic Plants

Aquatic plants form the foundation of healthy and flourishing lake ecosystems.

Lake Water Quality Data

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

Aquatic Invasive Species

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

Surface Water Grants

Learn about grants available for lake planning and protection and invasive species projects.
Surface Water Grants

Clean Boats, Clean Waters

Clean Boats, Clean Waters is an effort to check boats for invasive species and to educate boaters on their spread.
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