Simmon Lake
Marshall County, South Dakota67 acresView mapDirections
No nutrient or algae sampling on record from SD DANR for this lake.
Simmon Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 67 acres.
Simmon Lake is a 67-acre lake in Marshall County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Simmon 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.
Water quality measurements for Simmon Lake
These are the measurements SD DANR publishes for Simmon 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. TSI undefined.
Ask about Simmon Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
67 acres
Shoreline
2.2 mi
No bathymetric survey has been published for Simmon Lake, so its depth is not documented here.
Stays via Stay22
Stays near Simmon Lake
Compare lakeside cabins, hotels, and vacation rentals near Simmon Lake in Marshall 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 Simmon Lake
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Frequently asked questions about Simmon Lake
Where is Simmon Lake?
- Simmon Lake is a lake in Marshall 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 Simmon Lake?
- Simmon Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 67 acres.
Is Simmon Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Simmon Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.