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LakeQuality
B

Oconto County Lake Quality

Wisconsin, 62 lakes, average grade B (Good)

Oconto County in Wisconsin carries 62 graded lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

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. Round Lake (A) is the cleanest in the county.

Reviewed by LakeQuality Editorial Team · Updated
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DNR Reports (32)

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

All Lakes in Oconto County

RankLakeGradeClarityMax DepthPhosphorus
1Round LakeA16.8 ft31 ft13.8 µg/L
2Bass LakeA16.8 ft40 ft10.7 µg/L
3Bass LakeA-25 ft9.5 µg/L
4Explosion LakeA17 ft10 ft15.7 µg/L
5Archibald LakeA17.6 ft50 ft10.6 µg/L
6Green LakeA18.3 ft25 ft17.9 µg/L
7Paya LakeA20 ft40 ft10.5 µg/L
8Boot LakeA21.5 ft38 ft11.3 µg/L
9White LakeA15.7 ft--
10Star LakeA17 ft21 ft14.2 µg/L
11Bear Paw LakeA16 ft20 ft11.1 µg/L
12Shay LakeA15 ft36 ft14.2 µg/L
13Neligan LakeA15 ft23 ft11.1 µg/L
14Pine Ridge LakeA17 ft30 ft11 µg/L
15Halfmoon LakeA16 ft38 ft11.8 µg/L
16Maiden LakeA22.7 ft52 ft9.9 µg/L
17Wheeler LakeA22 ft35 ft11.9 µg/L
18Townsend Flowage LakeA--14 µg/L
19Little Archibald LakeA-65 ft15 µg/L
20Boulder LakeA11 ft11 ft13.3 µg/L
21Little Pickerel LakeA11 ft20 ft16.7 µg/L
22Chain LakeA13.5 ft42 ft9.5 µg/L
23Long LakeA14.5 ft-10.2 µg/L
24Crooked LakeA11 ft37 ft11.8 µg/L
25Anderson LakeA10 ft40 ft15 µg/L
26Kelly LakeA10 ft41 ft14.3 µg/L
27Ranch LakeA12.5 ft44 ft14.4 µg/L
28Little Horn LakeA13.3 ft25 ft14.4 µg/L
29Waubee LakeA13.5 ft23 ft10.5 µg/L
30Deadman LakeA14.1 ft45 ft9.7 µg/L
31Sunrise LakeA14 ft32 ft12.6 µg/L
32Finnegan LakeA10 ft38 ft15.3 µg/L
33Boundary LakeA14 ft19 ft12.1 µg/L
34Pickerel LakeB8 ft10 ft15.2 µg/L
35Berry LakeB7.5 ft27 ft15.3 µg/L
36Bear LakeB9 ft20 ft13.8 µg/L
37Grindle LakeB9 ft23 ft12.4 µg/L
38Reservoir PondB9.5 ft16 ft19.3 µg/L
39Surprise LakeB8 ft20 ft13.1 µg/L
40Smoke LakeB7.5 ft5 ft13 µg/L
41Pecor LakeB13.5 ft--
42Porcupine LakeB10.5 ft--
43Horn LakeB8.8 ft11 ft14.5 µg/L
44Munger LakeB7 ft19 ft15.6 µg/L
45Bass LakeB6 ft11 ft15.9 µg/L
46Shadow LakeB6 ft7 ft18 µg/L
47White Potato LakeB6.5 ft11 ft17 µg/L
48Gilkey LakeB6 ft6 ft10.4 µg/L
49Pickerel LakeC4.5 ft-27 µg/L
50Grignon LakeC6 ft-22.9 µg/L
51Chute Pond atC6 ft19 ft28 µg/L
52Wiscobee LakeC5.7 ft40 ft22 µg/L
53Christie LakeC3 ft10 ft13.1 µg/L
54Cooley LakeC5 ft42 ft39.3 µg/L
55Porcupine Lake-Deep HoleC6.5 ft20 ft54.3 µg/L
56Moody LakeC5 ft-44.1 µg/L
57Machickanee Flowage LakeD3 ft21 ft33.1 µg/L
58Peterson LakeD3.5 ft56 ft129.5 µg/L
59Hoerth LakeD5.5 ft23 ft108 µg/L
60Klaus LakeF3 ft50 ft92.7 µg/L

Source: EPA National Aquatic Resource Surveys, 2026.