Indian Slough
Indian Slough in Roberts County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 29 acres.
- Area
- 29 acres
Next lake in Roberts County
Swipe left or right on this bar to open the next or previous lake.
Why Indian 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 Indian 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.
Indian Slough is a 29-acre lake in Roberts County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Indian Slough water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Indian 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 Indian Slough
Compare lakeside cabins, hotels, and vacation rentals near Indian Slough in Roberts 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 Indian Slough
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 29 acres |
No bathymetric survey has been published for Indian Slough, so its depth is not documented here.
Fishing Indian Slough
Nearby Lakes in Roberts County
Frequently asked questions about Indian Slough
Where is Indian Slough?
- Indian Slough is a lake in Roberts 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 Indian Slough?
- Indian Slough in Roberts County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 29 acres.
Is Indian Slough safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Indian 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 Indian Slough across LakeQuality
More South Dakota Lake Rankings
Other Lakes in South Dakota
Where this data comes from
Measurements for Indian Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.