Lake Isabella
Marshall County, South Dakota73 acresView mapDirections
SD DANR publishes the water-quality measurements for Lake Isabella. Here is what has been measured.
- Limited data
Lake Isabella in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Chlorophyll-a (algae): 86.9 µg/L. Surface area: 73 acres.
Lake Isabella is a 73-acre lake in Marshall County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled 2017-07-25. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Isabella 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 Lake Isabella
These are the measurements SD DANR publishes for Lake Isabella, 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 86.9 µg/L.
| 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) | 86.9µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Lake Isabella
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
73 acres
Shoreline
1.4 mi
No bathymetric survey has been published for Lake Isabella, so its depth is not documented here.
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Stays near Lake Isabella
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Frequently asked questions about Lake Isabella
Where is Lake Isabella?
- Lake Isabella 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 Lake Isabella?
- Lake Isabella in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Chlorophyll-a (algae): 86.9 µg/L. Surface area: 73 acres.
Is Lake Isabella 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 Lake Isabella come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.