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

Find A Lake > Iowa County > Blackhawk Lake

Blackhawk Lake
Iowa County, 212 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 63 (Eutrophic) and was determined using chlorophyll data. For a Reservoir lake, this is considered Poor.

Blackhawk Lake has been monitored by volunteers since 1997. 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 and 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
Black Hawk Lake - Deep Hole253124Map2019Details
Blackhawk Lake - Left Dam Deepest Hole10017136Map2007Details