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Forest County Lake Quality

Wisconsin, 35 lakes, average grade A (Excellent)

There are 35 graded lakes in Forest County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. On average, Forest County lakes grade an A. That puts it near the top of the Wisconsin county ranking.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Silver Lake (A) is the cleanest in the county.

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DNR Reports (14)

Wisconsin DNR Fisheries Survey resources for lakes in Forest County. Showing 12 most recent — browse all reports →

All Lakes in Forest County

RankLakeGradeClarityMax DepthPhosphorus
1Silver LakeA42.7 ft-11.5 µg/L
2Round LakeA26.2 ft--
3Lily LakeA36.1 ft24 ft-
4Jungle LakeA34.5 ft--
5Little Sand LakeA26.2 ft20 ft15.9 µg/L
6Lake LucerneA61.5 ft73 ft9.3 µg/L
7Van Zile LakeA17.2 ft17 ft19.7 µg/L
8Franklin LakeA52.5 ft46 ft10.8 µg/L
9Butternut LakeA59.1 ft42 ft11.8 µg/L
10South Bay LakeA41 ft46 ft-
11Little Long LakeA43.5 ft30 ft-
12Lake MetongaA72.2 ft79 ft14 µg/L
13Roberts LakeA38.6 ft31 ft10.8 µg/L
14Walsh LakeA29.5 ft15 ft-
15Trump LakeA39.4 ft20 ft10.6 µg/L
16Luna LakeA18.7 ft35 ft5 µg/L
17St. Johns LakeA33.5 ft21 ft14.8 µg/L
18Ludington Lake-Deep HoleA31.8 ft30 ft-
19Mole LakeA27.9 ft17 ft15.3 µg/L
20Arbutus LakeA49.2 ft28 ft10.7 µg/L
21Bug LakeA--10 µg/L
22Cloud LakeA-25 ft13 µg/L
23Bear LakeA14.8 ft20 ft18.9 µg/L
24Pine LakeA16.4 ft15 ft28.2 µg/L
25Pickerel LakeA32.8 ft19 ft20.4 µg/L
26Crane LakeA22.1 ft25 ft22 µg/L
27Windfall LakeA32.8 ft25 ft21.2 µg/L
28Bishop LakeA23 ft12 ft25 µg/L
29Rice LakeB-6 ft22 µg/L
30Kaine LakeB10.7 ft-22.8 µg/L
31Devil'S LakeB--22 µg/L
32Little Rice LakeB-10 ft22 µg/L
33Rice Lake NorthC-6 ft44 µg/L
34Rice Lake South SnailC-6 ft48 µg/L
35Howell LakeC-16 ft34 µg/L

Source: EPA National Aquatic Resource Surveys, 2026.