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Geneva Lake Photo, Winter 2012

Geneva Lake Photo, Winter 2012
Photo by Cathy Milsap

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

Geneva Lake Association [exit DNR]

Geneva Lake Conservancy [exit DNR]

Geneva Lakes Environment Agency [exit DNR]

Find A Lake > Walworth County > Geneva Lake

Geneva Lake
Walworth County, 5401 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 39 (Oligotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Excellent.

Geneva Lake was monitored by volunteers between 1986 and 1994. 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. 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
Geneva Lake653303Map2014Details
Geneva Lake172Map1970Details
Geneva Lake - Buttons Bay999107Map1994Details
Geneva Lake - Deep Hole-Site A653122Map2017Details
Geneva Lake - East Basin653258Map1996Details
Geneva Lake - Narrows653257Map1996Details
Geneva Lake - South Side653302Map2005Details
Geneva Lake Site B at East End Near Lake Geneva WI653262Map2015Details
Geneva Lake at Center Near Lake Geneva WI653263Map2015Details
Geneva Lake at Geneva Bay653261Map1999Details
Geneva Lake at Willams Bay653264Map2010Details