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For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
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DNR Contacts for Delton Lake

Lake Delton Association [exit DNR]

Find A Lake > Sauk County > Delton Lake

Delton Lake
Sauk County, 249 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 64 (Eutrophic) and was determined using Secchi data. For a Reservoir lake, this is considered Fair.

Delton Lake was monitored by volunteers between 1993 and 2018. 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
Delton Lake - Delton Lake573200Map2004Details
Lake Delton - Center of Lake573055Map2018Details
Lake Delton at Spring Brook Creek573180Map2012Details