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For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
DNR Contacts for Twin Lakes (South)

North & South Twin Lakes Riparian Association [exit DNR]

North and South Twin Lakes Riparian Association [exit DNR]

Find A Lake > Vilas County > Twin Lakes (South)

Twin Lakes (South)
Vilas County, 628 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 45 (Mesotrophic) and was determined using satellite water clarity observations data. For a Two-Story lake, this is considered Good.

Twin Lakes (South) has been monitored by volunteers since 1993. 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 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
North Twin Lake - Herbicide Monitoring Site NT510048319Map2017Details
South Twin Lake - Deep Hole643106Map2019Details
South Twin Lake - N (Herbicide Monitoring Site 3)10044687Map2016Details
South Twin Lake - NE (Herbicide Monitoring Site 1)10044685Map2016Details
South Twin Lake - SW (Herbicide Monitoring Site 2)10044686Map2016Details