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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Douglas County Lake Quality

Wisconsin, 82 lakes, measured by Wisconsin DNR

Douglas County has 82 monitored 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 measurements reflect that mix. 14 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Douglas County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.

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. Whitefish Lake has the lowest nutrient and algae readings in the county.

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Where to stay near Douglas County

Top-rated places to stay near Douglas County

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Quick Answers for Douglas County

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

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

Fishing in Douglas County

Douglas County Fishing Guide

Fish species and the cleanest lakes in Douglas County

DNR Reports (13)

Wisconsin DNR Fisheries Survey 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

82 lakes · 14 ranked on readings, 68 without enough sampling14 lakes ranked on readings · 68 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicMax DepthAccess
1Whitefish LakeDouglas25 ft11 µg/LNo recent samplesNo recent samples102 ft✓ Public
2Saint Croix Flowage LakeDouglas10.5 ft23.8 µg/LNo recent samplesNo recent samplesNo recent samples✓ Public
3Amnicon LakeDouglas5 ft23.2 µg/LNo recent samplesNo recent samples31 ft✓ Public
4St Croix Flowage LakeDouglas6.8 ft23.2 µg/LNo recent samplesNo recent samplesNo recent samples✓ Public
5Leader LakeDouglas15.3 ft9.9 µg/LNo recent samplesNo recent samples56 ft✓ Public
6Lake MinnesuingDouglas6.2 ft16.2 µg/LNo recent samplesNo recent samples43 ft✓ Public
7Lake NebagamonDouglas7 ft17.9 µg/LNo recent samplesNo recent samples56 ft✓ Public
8Red LakeDouglas12 ft12.8 µg/LNo recent samplesNo recent samples37 ft✓ Public
9Person LakeDouglas7.6 ft25.3 µg/LNo recent samplesNo recent samples8 ft✓ Public
10St. Louis Bay LakeDouglas1.3 ft68 µg/L1.6 µg/LNo recent samplesNo recent samplesNot recorded
11Upper Estuary LakeDouglas2.1 ft52 µg/L1.4 µg/LNo recent samplesNo recent samples✓ Public
12Bardon LakeDouglas27 ft30 µg/LNo recent samplesNo recent samples102 ft✓ Public
13Dowling LakeDouglas2.5 ft50 µg/LNo recent samplesNo recent samples13 ft✓ Public
14Radigan Flowage LakeDouglas2 ft94.9 µg/LNo recent samplesNo recent samplesNo recent samples✓ Public
Bear LakeDouglas2 ftNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Tozer LakeDouglas3 ft38.2 µg/LNo recent samplesNo recent samplesNo recent samplesNot recorded
Unnamed LakeDouglasNo recent samples27.5 µg/LNo recent samplesNo recent samples6 ft✓ Public
Bond LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples67 ft✓ Public
St. Louis River Outlet Upstream of John A. Blatnik Memorial Bridge LakeDouglas1.6 ft65.5 µg/L2 µg/LNo recent samplesNo recent samples✓ Public
Duluth LakeDouglas1.6 ft54 µg/L2.9 µg/LNo recent samplesNo recent samples✓ Public
Lake SuperiorDouglasNo recent samples29 µg/LNo recent samplesNo recent samplesNo recent samplesNot recorded
Park Creek PondDouglasNo recent samples18 µg/LNo recent samplesNo recent samples7 ft✓ Public
Cheney LakeDouglasNo recent samples10.2 µg/LNo recent samplesNo recent samples21 ftNot recorded
Loon LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Crotty LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples16 ftNot recorded
Peterson LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Pickerel LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples23 ftNot recorded
Clear LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples39 ftNot recorded
Beglinger LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples16.4 ftNot recorded
Bass LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples26.2 ftNot recorded
Spider LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples17 ftNot recorded
Webb LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples25 ftNot recorded
Saint Croix FlowageDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples28 ftNot recorded
Kreide LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Two Mile LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples29.5 ftNot recorded
Sullivan LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6.6 ftNot recorded
Chain LakesDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples3.3 ftNot recorded
Frahm LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Clyde LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples10 ftNot recorded
Mulligan LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Alexander LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples8 ftNot recorded
Haugen LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples19.7 ftNot recorded
Thorn LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Crooked LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples9 ftNot recorded
Snake LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples39.4 ftNot recorded
Goose LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples5 ftNot recorded
Simms LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples41 ftNot recorded
Sauntrys Pocket LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples9 ft✓ Public
Upper Ox LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples19 ftNot recorded
Flat LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples3.3 ftNot recorded
Mud LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Lund LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples31 ftNot recorded
Beauregard LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples20 ft✓ Public
Rock LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples15 ft✓ Public
Black Fox LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6.6 ftNot recorded
Murray LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples14 ftNot recorded
Sand LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples18 ftNot recorded
Twin LakesDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6.6 ftNot recorded
Smith LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6.6 ftNot recorded
Lake of the WoodsDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples14 ftNot recorded
Upper Saint Croix LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples22 ft✓ Public
Island LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples16.4 ftNot recorded
Bass LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples9 ftNot recorded
Lower Ox LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples15 ftNot recorded
Long LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples26.2 ftNot recorded
Steele LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples8 ftNot recorded
Hoodoo LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples13 ftNot recorded
Big LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples7 ftNot recorded
Deer LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6.6 ftNot recorded
Gander LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples27 ftNot recorded
Muck LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Loon LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples20 ftNot recorded
Catherine LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples6 ftNot recorded
Mud LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Scout LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples9 ftNot recorded
Lyman LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples15 ft✓ Public
Moose Branch FlowageDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples5 ftNot recorded
Round LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples76 ftNot recorded
Crystal LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples22 ft✓ Public
Loon LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Wilson LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samples9 ftNot recorded
Black LakeDouglasNo recent samplesNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Browse every Wisconsin lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Wisconsin Department of Natural Resources. See data sources.