Lake Name:

a lake.
Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
DNR Contacts for Big Saint Germain Lake

Big St Germain Lake Area Association [exit DNR]

Find A Lake > Vilas County > Big Saint Germain Lake

Big Saint Germain Lake
Vilas County, 1622 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 54 (Eutrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Poor.

Big Saint Germain Lake has been monitored by volunteers since 1989. 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
Big St Germain Lake - Deep Hole643051Map2022Details
Big St. Germain Lake - Eastern Part Of Lake10042272Map2015Details
Big St. Germain Lake - North Of Bradford Point10042271Map2015Details