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LakeQuality
B

Douglas County Lake Quality

Minnesota, 52 lakes, average grade B (Good)

Douglas County in Minnesota carries 52 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.

A meaningful share of Douglas'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 Lobster Lake (A).

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DNR Reports (40)

Minnesota DNR LakeFinder resources for lakes in Douglas County. browse all reports →

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

All Lakes in Douglas County

52 lakes · 37 graded, 15 not rated37 graded lakes · 15 not rated, hidden

#LakeGradeClarityPhosphorusAlgaeTrophicMax DepthAccess
1ALobster LakeDouglasA13 ft20.5 µg/L3.6 µg/LNo recent samples65 ft✓ Public
2ALatoka LakeDouglasA19 ft11 µg/L2.2 µg/LNo recent samples108 ft✓ Public
3AMaple LakeDouglasA14.1 ft15 µg/L3.1 µg/LNo recent samples78 ft✓ Public
4AChippewa LakeDouglasA14.8 ft14 µg/L3.5 µg/LNo recent samples95 ft✓ Public
5ACowdry LakeDouglasA17.1 ft15 µg/L2.4 µg/LNo recent samples52 ft✓ Public
6AVermont LakeDouglasA14.1 ft12.5 µg/L4 µg/LNo recent samples59 ft✓ Public
7ADarling LakeDouglasA14 ft19 µg/L3.7 µg/LNo recent samples62 ftCarry-in
8AIda LakeDouglasA16.4 ft14 µg/L3 µg/LNo recent samples106 ft✓ Public
9ACrooked LakeDouglasA14 ft20 µg/L6.6 µg/LNo recent samples35 ft✓ Public
10AMiltona LakeDouglasA18.7 ft18 µg/L2.9 µg/LNo recent samples105 ft✓ Public
11AMary LakeDouglasA10.5 ft20 µg/L5.5 µg/LNo recent samples40 ft✓ Public
12ALe Homme Dieu LakeDouglasA13.1 ft21 µg/L3.7 µg/LNo recent samples85 ft✓ Public
13AGeneva LakeDouglasA14.1 ft21.5 µg/L4.9 µg/LNo recent samples63 ft✓ Public
14ARachel LakeDouglasA7.9 ft22.5 µg/L3.9 µg/LNo recent samples65 ft✓ Public
15AAndrew LakeDouglasA13.9 ft17 µg/L4 µg/LNo recent samples83 ft✓ Public
16AMoon LakeDouglasA21 ft11 µg/L1.8 µg/LNo recent samples38 ft✓ Public
17ALottie LakeDouglasA16.1 ft15.5 µg/L2.2 µg/LNo recent samples31 ft✓ Public
18ACarlos LakeDouglasA18 ft13.5 µg/L2.1 µg/LNo recent samples163 ft✓ Public
19ABrophy LakeDouglasA15.4 ft21 µg/L2.7 µg/LNo recent samples44 ft✓ Public
20ABurgen LakeDouglasA12 ft14.5 µg/L4.3 µg/LNo recent samples43 ft✓ Public
21ASouth Oscar LakeDouglasA16.7 ft20 µg/L2.9 µg/LNo recent samplesNo recent samples✓ Public
22AStoney LakeDouglasA19 ft13 µg/L2.8 µg/LNo recent samples58 ftCarry-in
23ALouise LakeDouglasA14.5 ft16 µg/L5.4 µg/LNo recent samples33 ft✓ Public
24ANorth Union LakeDouglasA20.3 ft13.5 µg/L2.4 µg/LNo recent samples42 ftCarry-in
25ABlackwell LakeDouglasA11.5 ft14.5 µg/L5.8 µg/LNo recent samples42 ft✓ Public
26BIrene LakeDouglasB9.8 ft24 µg/L7.4 µg/LNo recent samples44 ft✓ Public
27CMill LakeDouglasC11 ft23 µg/L9 µg/LNo recent samples40 ft✓ Public
28CVictoria LakeDouglasC10.2 ft21 µg/L7.5 µg/LNo recent samples60 ft✓ Public
29CPocket LakeDouglasC8.5 ft25 µg/L7.1 µg/LNo recent samples40 ft✓ Public
30CHenry LakeDouglasC5.9 ft25 µg/L12.5 µg/LNo recent samples32 ftCarry-in
31DAgnes LakeDouglasD5.4 ft37.5 µg/L15 µg/LNo recent samples31 ft✓ Public
32DJessie LakeDouglasD6.8 ft51.5 µg/L27.1 µg/LNo recent samples26 ftCarry-in
33DFreeborn LakeDouglasD4.6 ft35 µg/L16.9 µg/LNo recent samples18 ft✓ Public
34FRed Rock LakeDouglasF3.6 ft55 µg/L33.7 µg/LNo recent samples22 ft✓ Public
35FStowe LakeDouglasF2.6 ft94 µg/L70.3 µg/LNo recent samples14 ft✓ Public
36FSmith LakeDouglasF3.6 ft58 µg/L36 µg/LNo recent samples30 ft✓ Public
37FWinona LakeDouglasF2 ft88 µg/L48.5 µg/LNo recent samples9 ft✓ Public
NRUnnamed LakeDouglasNR3.3 ftNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
NRVenus LakeDouglasNR3 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesCarry-in
NRTurtle LakeDouglasNR10.5 ftNo recent samplesNo recent samplesNo recent samples21 ft✓ Public
NRMina LakeDouglasNR16 ftNo recent samplesNo recent samplesNo recent samples123 ft✓ Public
NRWolf LakeDouglasNR3.6 ft44 µg/L17 µg/LNo recent samples42 ft✓ Public
NRWhiskey LakeDouglasNR18.8 ftNo recent samplesNo recent samplesNo recent samples46 ft✓ Public
NRStony LakeDouglasNRNo recent samplesNo recent samplesNo recent samplesNo recent samples58 ftCarry-in
NRNelson LakeDouglasNR11 ftNo recent samplesNo recent samplesNo recent samples52 ft✓ Public
NRStockhaven LakeDouglasNR3.3 ftNo recent samplesNo recent samplesNo recent samplesNo recent samplesCarry-in
NRMoses LakeDouglasNR16.5 ftNo recent samplesNo recent samplesNo recent samples32 ft✓ Public
NRAaron LakeDouglasNR7 ftNo recent samplesNo recent samplesNo recent samples16 ft✓ Public
NRLittle Chippewa LakeDouglasNR9.3 ftNo recent samplesNo recent samplesNo recent samples24 ft✓ Public
NRAlvin LakeDouglasNR10.2 ftNo recent samplesNo recent samplesNo recent samples163 ft✓ Public
NRKensington Rearing PondDouglasNR1.3 ft42 µg/L22.5 µg/LNo recent samplesNo recent samplesNot recorded
NRSt. Louis Bay LakeDouglasNR1.3 ft70.5 µg/L1.8 µg/LNo recent samplesNo recent samples✓ 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.

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See how Douglas 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.