Where is Roosevelt Lake?

Roosevelt Lake is a lake in Tripp County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.

Roosevelt Lake

Tripp County, South Dakota86 acresView map Directions

SD DANR publishes the water-quality measurements for Roosevelt Lake. Here is what has been measured.

Chlorophyll-a

2.4 µg/L

Less algae than most

Measured by SD DANR

Area

86 acres

Surface area

Shoreline

3.6 mi

Measured length

Impaired · Mercury
Limited data

See the measurements Directions Where to stay

Roosevelt Lake in Tripp County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Chlorophyll-a (algae): 2.4 µg/L. Surface area: 86 acres.

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Roosevelt Lake is a 86-acre lake in Tripp County, South Dakota.

Source: EPA Water Quality Portal sampling records, SD DANR, last sampled 2017-06-06. Methodology: how these readings are compared.

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Roosevelt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO). Check local advisories before you swim.

Whether Roosevelt Lake is safe to swim in today is a call for the South Dakota Department of Agriculture and Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Roosevelt Lake

These are the measurements SD DANR publishes for Roosevelt Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. Chlorophyll-a 2.4 µg/L.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)		No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus		No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	2.4µg/L	Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water.

Ask about Roosevelt Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

86 acres

Shoreline

3.6 mi

No bathymetric survey has been published for Roosevelt Lake, so its depth is not documented here.

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Stays near Roosevelt Lake

Compare lakeside cabins, hotels, and vacation rentals near Roosevelt Lake in Tripp County, South Dakota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Roosevelt Lake

→ Roosevelt Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Roosevelt Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

MercuryOxygen depletion (low DO)

Designated uses not supporting: Aquatic life, Recreation.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit SD-MI-L-ROOSEVELT_01 · Official waterbody report

Nearby Lakes in Tripp County

Lambert Lake8.2 miView →Dog Ear Lake13.9 miView →Hamill Dam Reservoir27.3 miView →Little Dog Ear Lake21.5 miView →

Frequently asked questions about Roosevelt Lake

Where is Roosevelt Lake?: Roosevelt Lake is a lake in Tripp County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.
What is the water quality of Roosevelt Lake?: Roosevelt Lake in Tripp County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Chlorophyll-a (algae): 2.4 µg/L. Surface area: 86 acres.
Is Roosevelt Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Roosevelt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, oxygen depletion (low DO). Check local advisories before you swim.