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

Granite Lake Association, Inc. [exit DNR]

Find A Lake > Barron County > Granite Lake

Granite Lake
Barron County, 155 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 50 (Mesotrophic) and was determined using Secchi data. For a Deep Lowland lake, this is considered Good. Deep Lowland lakes stratify, or form separate layers of water, during the summer months and have watersheds greater than 4 square miles in area.

Granite Lake has been monitored by volunteers since 1994. Volunteers monitor water clarity with a black and white Secchi disk. 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. 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
Granite Lake - Granite Lake034003Map1979Details
Granite Lake South Basin10022808Map2019Details
Granite Lake at Deep Hole033177Map2019Details
Little Granite Lake - Deep Spot033216Map1990Details