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Curly-Leaf Pondweed Project

Big Chetac Chain Lakes Association is sponsoring a 3-yr project to implement approved activities from the Big Chetac Lake Aquatic Plant Management Plan, including 1) Curly-leaf pondweed chemical & manual control; 2) Pre-post treatment aquatic plant monitoring; 3) Turion monitoring; 4) Planting native aquatic plants; 5) AIS education & monitoring.

Information and reports

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

Big Chetac And Birch Lakes Association [exit DNR]

Find A Lake > Sawyer County > Lake Chetac

Lake Chetac
Sawyer County, 2400 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 72 (Hypereutrophic) and was determined using chlorophyll data. For a Shallow Lowland lake, this is considered Poor. 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.

Lake Chetac has been monitored by volunteers since 1995. 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. Lake Chetac is also part of DNR's long term trend monitoring project. 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
Big Chetac Lake - [Herbicide Sampling Site 10]10043564Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 1]10042107Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 2]10042108Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 3]10042109Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 4]10042110Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 5]10042111Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 6]10042112Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 7]10042113Map2014Details
Big Chetac Lake - [Herbicide Sampling Site 8]10042114Map2015Details
Big Chetac Lake - [Herbicide Sampling Site 9]10042115Map2015Details
Chetac Lake - Deepest Spot583090Map1996Details
Chetac Lake - Off Boat Landing On Ne Shore583176Map2019Details
Lake Chetac - Site B - South Basin583096Map2018Details
Lake Chetac - Site C - Central Basin583109Map2019Details
Lake Chetac North Basin Deep Hole583095Map2019Details