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DNR Contacts for Nelson Lake

Nelson Lake Association [exit DNR]

Nelson Lake Resort Association [exit DNR]

Find A Lake > Sawyer County > Nelson Lake

Nelson 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 54 (Eutrophic) and was determined using Secchi data. For a Reservoir lake, this is considered Good.

Nelson Lake has been monitored by volunteers since 2001. 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 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
Nelson Lake - Site A Deep Hole583168Map2023Details
Nelson Lake - Site B East Basin583169Map2023Details
Nelson Lake - Site C West Basin583170Map2022Details
Nelson Lake deep area near dam10044708Map2016Details