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Butternut Lake in Forest County - Luke Ernster

Butternut Lake in Forest County - Luke Ernster
Photo by Luke Ernster

Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
DNR Contacts for Butternut Lake

Butternut-Franklin Lakes Association Inc [exit DNR]

Butternut-Franklin Lakes Improvement Association [exit DNR]

Find A Lake > Forest County > Butternut Lake

Butternut Lake
Forest County, 1246 Acres


Water Quality

One measure of a lakes health is the trophic state, which relates to the amount of algae in the water. The average summer trophic state for the last 5 years was 40 (Oligotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Excellent.

Butternut Lake has been monitored by volunteers since 1987. Volunteers monitor water clarity with a black and white Secchi disk. Some also collect water samples, which are sent to the State Lab of Hygiene to be analyzed. Volunteers are the source of the majority of Wisconsin's lake water quality data, and their dedication is greatly appreciated. Additional monitoring has been done through projects funded in part by DNR Lake Grants and Aquatic Invasive Species Grants. Reports and graphs featuring data collected by volunteers, DNR staff and others can be viewed below.

Water Quality Reports and Graphs

Station NameStation IDMapMax YearReports
Butternut Lake - Site 1-Main Basin South Central213070Map2015Details
Butternut Lake - Site 2 Nw Main Basn213071Map2015Details
Butternut Lake - Site 3-Deep Hole213137Map2019Details
Butternut Lake - Site 4 East Lobe213072Map1997Details
Butternut Lake - Site 5 South Lobe213073Map1997Details