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Black Oak Lake

Black Oak Lake
Photo by Walt Bates

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

Black Oak Lake Riparian Owners [exit DNR]

Find A Lake > Vilas County > Black Oak Lake

Black Oak Lake
Vilas County, 564 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 34 (Oligotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Excellent.

Black Oak Lake has been monitored by volunteers since 2002. 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
Black Oak Lake - Deep Hole643126Map2019Details