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DNR Contacts for Decorah Lake

Find A Lake > Juneau County > Decorah Lake

Decorah Lake
Juneau County, 314 Acres


Decorah Lake was monitored by volunteers between 2007 and 2019. 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
Decorah Lake - Decorah Lake294006Map1979Details
Decorah Lake - Decorah Lake293073Map1993Details
Decorah Lake - Deep Hole293152Map2004Details
Decorah Lake - Deep Hole Above Dam293155Map2019Details