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DNR Contacts for Lower Nashotah Lake

Lower Nashotah Lake Association [exit DNR]

Find A Lake > Waukesha County > Lower Nashotah Lake

Lower Nashotah 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 44 (Mesotrophic) and was determined using Secchi data. For a Two-Story lake, this is considered Good.

Lower Nashotah Lake has been monitored by volunteers since 1987. 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. 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
Joseph Property - Private on Lower Nashotah10056699Map2021Details
Lower Nashotah Lake - Deep Hole683130Map2024Details