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 Forest Lake

Forest Lake Association, Inc [exit DNR]

Forest Lake Preservation Foundation, Inc.

Find A Lake > Vilas County > Forest Lake

Forest Lake
Vilas County, 468 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.

Forest Lake has been monitored by volunteers since 1990. 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 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
Forest Lake - Deep Hole643449Map2021Details
Forest Lake - Forest Lake644018Map1979Details
Forest Lake - Herbicide Monitoring Site - F110053784Map2020Details
Forest Lake - Herbicide Monitoring Site - F210053785Map2020Details
Forest Lake - Herbicide Monitoring Site - F310053786Map2020Details
Forest Lake - Herbicide Monitoring Site - F410053787Map2020Details
Forest Lake - Herbicide Monitoring Site - F510053788Map2020Details
Forest Lake - N (Herbicide Monitoring Site 3)10043504Map2015Details
Forest Lake - N Bay (Herbicide Monitoring Site 1)10043502Map2015Details
Forest Lake - N Shore (Herbicide Monitoring Site 2)10043503Map2020Details