WI · ranked by public data
2 Columbia County lakes are at least 50 acres with a current DNR water-clarity reading, out of 44 documented lakes in the county. Updated July 2026.
Columbia County, WI
4.8 ft water clarity (May 2026) · 407 acres, 82 ft max depth · 1 public landing · DNR impairment listed
Columbia County, WI
4 ft water clarity (May 2026) · 7,197 acres, 24 ft max depth · 15 public landings · DNR impairment listed
Methodology
FAQ
Swan Lake — By most recent Secchi reading, Swan Lake in Columbia County is the clearest monitored lake in Columbia County, with 4.8 feet of visibility.
Source data: Wisconsin DNR lake and monitoring records as aggregated by LakeList. Figures reflect the most recent documented values, not new surveys — verify access and rules before you go. Lake outlines are shoreline shapes from LakeList and the USGS National Hydrography Dataset; they illustrate a lake's form and are not depth or navigation charts.