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

Two Sisters Lake Property Owners Association [exit DNR]

Find A Lake > Oneida County > Two Sisters Lake

Two Sisters Lake
Oneida County, 719 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.

Two Sisters Lake has been monitored by volunteers since 1986. 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
Two Sisters Lake - Birch Bay - Zebra Mussel Sampling Location10030262Map2009Details
Two Sisters Lake - Eagle Bay - Zebra Mussel Sampling Location10030263Map2009Details
Two Sisters Lake - East Bay443147Map2019Details
Two Sisters Lake - West Bay443391Map2019Details