East Flat Lake
East Flat Lake in Campbell County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 152 acres.
- Area
- 152 acres
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Why East Flat Lake 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 East Flat Lake, 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.
East Flat Lake is a 152-acre lake in Campbell County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch East Flat Lake 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 East Flat Lake
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 East Flat Lake
Compare lakeside cabins, hotels, and vacation rentals near East Flat Lake in Campbell 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 East Flat Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 152 acres |
No bathymetric survey has been published for East Flat Lake, so its depth is not documented here.
Fishing East Flat Lake
Nearby Lakes in Campbell County
Frequently asked questions about East Flat Lake
Where is East Flat Lake?
- East Flat Lake is a lake in Campbell 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 East Flat Lake?
- East Flat Lake in Campbell County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 152 acres.
Is East Flat Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. East Flat Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for East Flat Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.