Parsons Pass
Parsons Pass in Marshall County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1583 acres.
- Area
- 1,583 acres
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Why Parsons Pass 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 Parsons Pass, 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.
Parsons Pass is a 1,583-acre lake in Marshall County, South Dakota.
Source: EPA Water Quality Portal sampling records, SD DANR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Parsons Pass 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 Parsons Pass
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 Parsons Pass
Compare lakeside cabins, hotels, and vacation rentals near Parsons Pass in Marshall 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 Parsons Pass
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,583 acres |
No bathymetric survey has been published for Parsons Pass, so its depth is not documented here.
Fishing Parsons Pass
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Frequently asked questions about Parsons Pass
Where is Parsons Pass?
- Parsons Pass is a lake in Marshall 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 Parsons Pass?
- Parsons Pass in Marshall County, South Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1583 acres.
Is Parsons Pass safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Parsons Pass 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 Parsons Pass come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.