Shawano Lake

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 52 (Eutrophic) and was determined using chlorophyll data. For a Shallow Lowland lake, this is considered Excellent. 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.

Shawano Lake was monitored by volunteers between 1988 and 2016. 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. Shawano Lake 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 Name	Station ID	Map	Max Year	Reports
Shawano Lake - Deep Hole	593072	Map	2024	Details
Shawano Lake - E (Herbicide Monitoring Site 5)	10044690	Map	2019	Details
Shawano Lake - East Central Part Of Lake	593145	Map	2019	Details
Shawano Lake - Northwest Basin	593154	Map	2016	Details
Shawano Lake - Outlet Above Sth 47100' Above Bridge On N. Side Of Channel	593139	Map	1998	Details
Shawano Lake - Southwest Bay (Herbicide Monitoring Site 1)	10042086	Map	2014	Details
Shawano Lake - Southwest Bay (Herbicide Monitoring Site 2)	10042087	Map	2014	Details
Shawano Lake - Southwest Bay (Herbicide Monitoring Site 3)	10042088	Map	2014	Details
Shawano Lake - Southwest Bay (Herbicide Monitoring Site 4)	10042089	Map	2014	Details
Shawano Lake - W Basin Betw. Island & Outlet	593153	Map	2016	Details