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

Day County Lake Quality

South Dakota, 29 lakes, measured by SD DANR

There are 29 monitored lakes in Day County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 29 monitored lakes in Day County carry whatever clarity, phosphorus, and chlorophyll-a readings SD DANR has published, shown as reported.

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.

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Where to stay near Day County

Top-rated places to stay near Day County

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Quick Answers for Day County

Cleanest lakes in Day County →Best swimming lakes in South Dakota →

Planning a trip? Check special fishing regulations for Horseshoe Lake — or check the official South Dakota fishing regulations.

All Lakes in Day County

29 lakes · 0 ranked on readings, 29 without enough sampling0 lakes ranked on readings · 29 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicAccess
Horseshoe LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Sweetwater LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Bitter LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Holmquist SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pierpont LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Lynn LakeDayNo recent samplesNo recent samples6.9 µg/LNo recent samplesNot recorded
Hazelden LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Stangland SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Goose LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Phragmites PondDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Swan PondDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Spring LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Hillebrands LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Campbell SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Anderson LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Headman SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dahling SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Minnewasta LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Little Rush LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Rush LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
South Waubay LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Buchner SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Antelope LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Solomon SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Goose LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Foldager SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Arneson SloughDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mud LakeDayNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Long LakeDayNo 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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Other Counties in South Dakota

Pennington County

2 lakes

Roberts County

20 lakes

Hughes County

2 lakes

Charles Mix County

8 lakes

Walworth County

4 lakes

Sully County

9 lakes

Browse every South Dakota 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 South Dakota Department of Agriculture and Natural Resources. See data sources.