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

Clark County Lake Quality

South Dakota, 21 lakes, measured by SD DANR

There are 21 monitored lakes in Clark County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The 21 monitored lakes in Clark 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 Clark County

Top-rated places to stay near Clark County

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Quick Answers for Clark County

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

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

All Lakes in Clark County

21 lakes · 0 ranked on readings, 21 without enough sampling0 lakes ranked on readings · 21 without enough sampling, hidden

#LakeClarityPhosphorusAlgaeTrophicAccess
Mud LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Willow LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Fordham DamClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Mud LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Antelope LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Logan DamClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dry Lake Number OneClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Baileys LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Madian LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Round LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Lone Tree LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Twin SloughsClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cottonwood LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Heggs LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Swan LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samples✓ Public
Carson LakeClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Lake ToddClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Pepper SloughClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Mankey SloughClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Dry Lake Number TwoClarkNo recent samplesNo recent samplesNo recent samplesNo recent samplesNot recorded
Cherry LakeClarkNo 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.