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LakeQuality
B

Sawyer County Lake Quality

Wisconsin, 52 lakes, average grade B (Good)

Sawyer County has 52 graded lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the grade distribution reflects that mix. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Lac Courte Oreilles Lake (A); the most-stressed is Mb-2a Cul Lake (F).

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DNR Reports (20)

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

All Lakes in Sawyer County

RankLakeGradeClarityMax DepthPhosphorus
1Lac Courte Oreilles LakeA38.7 ft90 ft16 µg/L
2Grindstone LakeA57.7 ft60 ft14.4 µg/L
3Windigo LakeA36.1 ft51 ft15.6 µg/L
4Spider LakeA32.8 ft64 ft14.1 µg/L
5Round LakeA68.2 ft74 ft14.4 µg/L
6Christner LakeA33.8 ft-19.5 µg/L
7Little Sissabagama LakeA39.4 ft75 ft14.7 µg/L
8Osprey LakeA55 ft-14 µg/L
9Tiger Cat Flowage LakeA35.3 ft30 ft13.5 µg/L
10Clear LakeA56.9 ft32 ft11.2 µg/L
11Lost LakeA33.1 ft-18 µg/L
12Lost Land LakeA32 ft21 ft17.2 µg/L
13Mud LakeA32.8 ft-19 µg/L
14Connors LakeA39.4 ft-13.8 µg/L
15Whitefish LakeA43.3 ft105 ft13.6 µg/L
16Little Lac Courte LakeA39.7 ft46 ft-
17Blueberry LakeA48.6 ft29 ft17 µg/L
18Lake PlacidA49.2 ft30 ft12.2 µg/L
19Ashegon LakeA33 ft56 ft18 µg/L
20Lake of the PinesA23 ft-16.8 µg/L
21Little Round LakeA57.7 ft38 ft12 µg/L
22Black Dan LakeA32 ft--
23Teal LakeA21.3 ft31 ft16.5 µg/L
24Smith LakeA19.7 ft29 ft-
25Barber LakeA33.9 ft21 ft14 µg/L
26Sissabagama LakeA26.9 ft48 ft18.7 µg/L
27Burns LakeA37.7 ft-12.7 µg/L
28Mcclaine LakeA46.8 ft-12.5 µg/L
29Billy Boy Flowage LakeA-46 ft15 µg/L
30Little Lac Courte Oreilles LakeA38.6 ft46 ft21 µg/L
31Sand LakeA31.2 ft50 ft23.8 µg/L
32Gurno LakeA31.2 ft27 ft27 µg/L
33Indian LakeA20.3 ft-23 µg/L
34Durphee LakeA26.2 ft-22 µg/L
35Nelson LakeA15.2 ft-23.9 µg/L
36Lower Clam LakeA18 ft30 ft29.5 µg/L
37Callahan LakeA34.8 ft18 ft22.3 µg/L
38Spring LakeB29.2 ft18 ft27.5 µg/L
39Chippewa Flowage LakeB23.6 ft92 ft29 µg/L
40Pike LakeB24.9 ft17 ft25 µg/L
41Chippewa Flowage -Pokegema LakeB19 ft92 ft29 µg/L
42Chippewa Flowage -North of Cranberry Bars LakeB15.9 ft92 ft37 µg/L
43Pacwawong Spring PondB13.6 ft14 ft-
44Indian School LakeB-6 ft24.1 µg/L
45Green LakeB12.1 ft9 ft36 µg/L
46Chippewa Flowage -Winter Dam LakeB14.3 ft92 ft49 µg/L
47Chippewa Flowage -Moore'S Bay LakeB13.6 ft92 ft40 µg/L
48Moose LakeB9 ft21 ft28.9 µg/L
49Lake Chetac North BasinC-26 ft56.7 µg/L
50Birch LakeD-73 ft60.3 µg/L
51Lake ChetacD-26 ft68.8 µg/L
52Mb-2a Cul LakeF--215 µg/L

Source: EPA National Aquatic Resource Surveys, 2026.