Grand Lake Seboeis
Grand Lake Seboeis in Penobscot County, Maine is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2604 acres.
- Area
- 2,604 acres
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Why Grand Lake Seboeis 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 Grand Lake Seboeis, 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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Grand Lake Seboeis is a 2,604-acre lake in Penobscot County, Maine.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Grand Lake Seboeis
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 Grand Lake Seboeis
Compare lakeside cabins, hotels, and vacation rentals near Grand Lake Seboeis in Penobscot County, Maine — 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 Grand Lake Seboeis
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,604 acres |
No bathymetric survey has been published for Grand Lake Seboeis, so its depth is not documented here.
Fishing Grand Lake Seboeis
Nearby Lakes in Penobscot County
Frequently asked questions about Grand Lake Seboeis
Where is Grand Lake Seboeis?
- Grand Lake Seboeis is a lake in Penobscot County, Maine. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Grand Lake Seboeis?
- Grand Lake Seboeis in Penobscot County, Maine is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2604 acres.
Is Grand Lake Seboeis safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Grand Lake Seboeis is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Grand Lake Seboeis across LakeQuality
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Where this data comes from
Measurements for Grand Lake Seboeis come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.