Headman Slough
Headman Slough in Day County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 92 acres.
- Area
- 92 acres
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Why Headman Slough 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 Headman Slough, 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.
Headman Slough is a 92-acre lake in Day County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Headman Slough water quality
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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 Headman Slough
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 Headman Slough
Compare lakeside cabins, hotels, and vacation rentals near Headman Slough in Day 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 Headman Slough
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 92 acres |
No bathymetric survey has been published for Headman Slough, so its depth is not documented here.
Fishing Headman Slough
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Frequently asked questions about Headman Slough
Where is Headman Slough?
- Headman Slough is a lake in Day 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 Headman Slough?
- Headman Slough in Day County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 92 acres.
Is Headman Slough safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Headman Slough is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Headman Slough across LakeQuality
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Where this data comes from
Measurements for Headman Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.