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Mirror Lake

Mirror Lake
Photo by Wisconsin DNR

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

Mirror Lake Association Inc [exit DNR]

Mirror Lake District [exit DNR]

Find A Lake > Sauk County > Mirror Lake

Mirror Lake
Sauk County, 139 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 55 (Eutrophic) and was determined using chlorophyll data. For a Impounded Flowing Water lake, this is considered Good.

Mirror 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
Mirror Lake - Deep Hole573036Map2007Details
Mirror Lake - Site 1 South Basin Near Boat Landing573079Map2019Details
Mirror Lake - Site 2 North Basin573080Map2013Details
Mirror Lake - Site 3 West - Deep Hole573056Map2018Details