Lac Vieux Desert

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 Shallow Lowland lake, this is considered Good. Shallow Lowland lakes do not stratify, or form separate layers of water, during the summer months and have watersheds greater than 4 square miles in area.

Lac Vieux Desert was monitored by volunteers in 1993. 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 Name	Station ID	Map	Max Year	Reports
Lac Vieux Desert - Lac Vieux Desert	217	Map	1970	Details
Lac Vieux Desert - Max Depth	643206	Map	2022	Details
Lac Vieux Desert - Outlet Bay	10042274	Map	2016	Details
Lac Vieux Desert - Southeast of Duck Island	10042273	Map	2016	Details
Lac Vieux Desert Lake - Lac Vieux Desert Lake	644057	Map	1979	Details