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Upper Eau Claire Lake

Upper Eau Claire Lake
Photo by Alex Smith

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

Find A Lake > Bayfield County > Upper Eau Claire Lake

Upper Eau Claire Lake
Bayfield County, 1024 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 36 (Oligotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Excellent.

Upper Eau Claire Lake has been monitored by volunteers since 1998. 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. Upper Eau Claire Lake is also part of DNR's long term trend monitoring project. 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
Upper Eau Claire Lake - Deep Hole043129Map2019Details