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LakeQuality
B

Marinette County Lake Quality

Wisconsin, 22 lakes, average grade B (Good)

There are 22 graded lakes in Marinette County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

A meaningful share of Marinette's lakes break 50 feet of depth, which matters because deep lakes hold cooler water all summer and resist the resuspended-sediment problems that plague shallow basins. The county's best-graded lake is King Lake (A).

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Quick Answers for Marinette County

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

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

Fishing in Marinette County

Marinette County Fishing Guide

Fish species and best-graded lakes in Marinette County

DNR Reports (19)

Wisconsin DNR Fisheries Survey resources for lakes in Marinette County. browse all reports →

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

All Lakes in Marinette County

22 lakes · 10 graded, 12 not rated10 graded lakes · 12 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicMax DepthAccess
1AKing LakeMarinetteANo recent samples9 µg/L0.8 µg/LNo recent samples70 ftNot recorded
2BLake NoquebayMarinetteB7.3 ft19.4 µg/LNo recent samplesNo recent samples51 ft✓ Public
3BThunder LakeMarinetteB18 ft10.6 µg/LNo recent samplesNo recent samples62 ft✓ Public
4BLittle Newton LakeMarinetteB10.5 ft13.2 µg/LNo recent samplesNo recent samples53 ft✓ Public
5BMary LakeMarinetteB9 ft13.5 µg/LNo recent samplesNo recent samples38 ft✓ Public
6BTown Corner LakeMarinetteB9.7 ft15 µg/LNo recent samplesNo recent samples9 ft✓ Public
7BGilas LakeMarinetteB15 ft12.6 µg/LNo recent samplesNo recent samples88 ft✓ Public
8BBig Newton LakeMarinetteB17 ft10.7 µg/LNo recent samplesNo recent samples40 ft✓ Public
9BOneonta LakeMarinetteB7.5 ft16.7 µg/LNo recent samplesNo recent samples24 ft✓ Public
10CYankee LakeMarinetteC3 ft26.5 µg/LNo recent samplesNo recent samples20 ft✓ Public
NRBass LakeMarinetteNRNo recent samplesNo recent samplesNo recent samplesNo recent samples65 ft✓ Public
NREagle LakeMarinetteNR15 ftNo recent samplesNo recent samplesNo recent samples30 ft✓ Public
NRSand LakeMarinetteNRNo recent samplesNo recent samplesNo recent samplesNo recent samples32 ftNot recorded
NRLost LakeMarinetteNRNo recent samples13.3 µg/LNo recent samplesNo recent samples18 ft✓ Public
NRCaldron Falls ReservoirMarinetteNR5.2 ftNo recent samplesNo recent samplesNo recent samples40 ft✓ Public
NRShannon LakeMarinetteNR7.5 ft18.5 µg/LNo recent samplesNo recent samples37 ftNot recorded
NRSmith LakeMarinetteNRNo recent samples15.6 µg/LNo recent samplesNo recent samples11 ft✓ Public
NRHigh Falls Reservoir atMarinetteNR9.5 ftNo recent samplesNo recent samplesNo recent samples54 ft✓ Public
NRHilbert LakeMarinetteNR12 ft13.1 µg/LNo recent samplesNo recent samples32 ft✓ Public
NRSandstone Flowage LakeMarinetteNR5.5 ftNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRMontana LakeMarinetteNR8 ft17.5 µg/LNo recent samplesNo recent samples28 ft✓ Public
NRLittle Mccall LakeMarinetteNRNo recent samples13.8 µg/LNo recent samplesNo recent samples21 ft✓ Public

NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

Lake Match

Which lake suits how you actually use one?

Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.

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Other Counties in Wisconsin

Outagamie County

1 lake · Avg grade A

Washington County

15 lakes · Avg grade B

Kenosha County

12 lakes · Avg grade B

Forest County

34 lakes · Avg grade B

Waushara County

32 lakes · Avg grade B

Menominee County

8 lakes · Avg grade B

See how Marinette County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.

Source: EPA National Aquatic Resource Surveys, 2026.