WI · ranked by public data

Clearest Lakes in Monroe County, Wisconsin, Ranked

1 Monroe County lake are at least 50 acres with a current DNR water-clarity reading, out of 37 documented lakes in the county. Updated July 2026.

11.3 ft
245 acres
Monroe County, WI
Lake Tomah
enhancedDepth mapDNR impairmentWater dataDNR forecast
43.98, -90.52245 acres | 19 ft max4 public access pointsLargemouth Bass, Northern Pike
1.3 ft water clarity (Aug 2019) · 245 acres, 19 ft max depth · 4 public landings · DNR impairment listed

Methodology

How this list is built

Ranked by the most recent documented Secchi disk reading (feet of visibility) from DNR/CLMN monitoring.
Readings older than 10 years are excluded — a decades-old reading no longer says anything about today's water.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Readings deeper than the lake's own documented maximum depth are treated as source-data errors and excluded.
Clarity swings with season and weather, so the reading date is shown for every lake.
Only monitored lakes can rank. A clear lake nobody measures cannot appear here — this list rewards documentation as much as clarity.

FAQ

Monroe County lake records

What is the clearest lake in Monroe County?

Lake Tomah — By most recent Secchi reading, Lake Tomah in Monroe County is the clearest monitored lake in Monroe County, with 1.3 feet of visibility.

Clearest lakes statewide Deepest lakes in Monroe County Biggest lakes in Monroe County Lakes with the most public access in Monroe County All Monroe County lakes

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.