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LakeQuality
B

Douglas County Lake Quality

Wisconsin, 40 lakes, average grade B (Good)

There are 40 graded lakes in Douglas County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. With an average grade of B, Douglas County sits comfortably above the Wisconsin median.

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 Leader Lake (A); the most-stressed is St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge Lake (F).

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Quick Answers for Douglas County

Cleanest lakes in Douglas County →Cleanest lakes in Wisconsin →Safest swimming lakes in Wisconsin →

Planning a trip? Check special fishing regulations for Leader Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.

DNR Reports (13)

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

All Lakes in Douglas County

RankLakeGradeClarityMax DepthPhosphorus
1Leader LakeA50.9 ft56 ft9.5 µg/L
2Bear LakeA16.4 ft10 ft-
3Whitefish LakeA82 ft102 ft11.4 µg/L
4Whitefish LakeA86.9 ft102 ft9.4 µg/L
5Lake NebagamonA23 ft56 ft17.7 µg/L
6Red LakeA39.4 ft37 ft12.5 µg/L
7Lake MinnesuingA19.7 ft43 ft16.2 µg/L
8Wp22-T2b LakeA15.1 ft--
9Bond LakeA59.1 ft67 ft-
10Bardon LakeA88.6 ft102 ft9.4 µg/L
11Lk Superior 3.3 Mi E of Superior LakeA--9 µg/L
12Lk Superior .09 Mi N of Poplar Creek Mouth LakeA--16 µg/L
13Park Creek PondA-7 ft18 µg/L
14Cheney LakeA-21 ft10.2 µg/L
15Su22b LakeA---
16Amnicon LakeA16.4 ft31 ft23.2 µg/L
17St Croix Flowage LakeA21.3 ft-23.2 µg/L
18Saint Croix Flowage LakeA27.9 ft-23.8 µg/L
19Person LakeA25.4 ft-25.2 µg/L
20Unnamed LakeB-6 ft27.5 µg/L
21Wp22-T4b LakeB11.8 ft--
22Wp22-T1b LakeB12.9 ft--
23Wp22-T3b LakeB11.8 ft--
24Wp22-T1a LakeB10.8 ft--
25Wp22-T2a LakeB10.8 ft--
26Lk Superior .05 Mi N of Pearson Creek Mouth LakeB--21 µg/L
27Lk Superior LakeB--29 µg/L
28Tozer LakeC9.8 ft-38.2 µg/L
29Dowling LakeC8.2 ft13 ft50 µg/L
30Wp22-T6a LakeC7.5 ft--
31Wp22-T5a LakeC7.5 ft--
32Wp22-T6b LakeC9.7 ft--
33Wp22-T5b LakeC7.5 ft--
34Lk Superior .63 Mi Wsw of Fisher Creek Mouth LakeC--34 µg/L
35Lk Superior .02 Mi N of Dutchman Creek Mouth LakeC--49 µg/L
36Dowling LakeC--54.8 µg/L
37Wp22-T4a LakeD5.4 ft--
38Wp22-T3a LakeD5.4 ft--
39Radigan Flowage LakeD6.6 ft-94.9 µg/L
40St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge LakeF2.9 ft--

Source: EPA National Aquatic Resource Surveys, 2026.