Lake Winfred
Lake Winfred in Lake County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 25 acres.
- Area
- 25 acres
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Why Lake Winfred has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Winfred, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by SD DANR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Winfred is a 25-acre lake in Lake County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Winfred
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Lake Winfred
Compare lakeside cabins, hotels, and vacation rentals near Lake Winfred in Lake 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.
Top-rated places to stay near Lake Winfred
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 25 acres |
No bathymetric survey has been published for Lake Winfred, so its depth is not documented here.
Fishing Lake Winfred
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Frequently asked questions about Lake Winfred
Where is Lake Winfred?
- Lake Winfred is a lake in Lake County, South Dakota. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Winfred?
- Lake Winfred in Lake County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 25 acres.
Is Lake Winfred safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Winfred is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Lake Winfred across LakeQuality
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Other Lakes in South Dakota
Where this data comes from
Measurements for Lake Winfred come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.