Jamestown Reservoir
Stutsman County, North Dakota2,568 acresView mapDirections
Not enough samples to grade — no water-quality sampling on record for this lake. No letter yet. Here is what we do have.
Jamestown Reservoir in Stutsman County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2568 acres.
- Area
- 2,568 acres
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Stays near Jamestown Reservoir
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Watch Jamestown Reservoir’s letter
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Why Jamestown Reservoir 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 Jamestown Reservoir, 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 NDDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Jamestown Reservoir is a 2,568-acre lake in Stutsman County, North Dakota.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
What Jamestown Reservoir is good for
From access and monitoring records, not editorial picks.
- Big water2,568 acres
Swimming Safety
Not ratedElevated nutrients
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Jamestown Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. TSI 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) |
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,568 acres |
No bathymetric survey has been published for Jamestown Reservoir, so its depth is not documented here.
Fishing Jamestown Reservoir
Graded lakes near Jamestown Reservoir
Jamestown Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Stutsman County
Frequently asked questions about Jamestown Reservoir
Where is Jamestown Reservoir?
- Jamestown Reservoir is a lake in Stutsman County, North Dakota. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Jamestown Reservoir?
- Jamestown Reservoir in Stutsman County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2568 acres.
Is Jamestown Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Jamestown Reservoir across LakeQuality
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Where this data comes from
Measurements for Jamestown Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Depth, fish, and access data from North Dakota Game & Fish