Middle Jo-Mary Lake
Middle Jo-Mary Lake in Penobscot County, Maine is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 767 acres.
- Area
- 767 acres
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Why Middle Jo-Mary 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 Middle Jo-Mary 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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Middle Jo-Mary Lake is a 767-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 Middle Jo-Mary 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 Middle Jo-Mary Lake
Compare lakeside cabins, hotels, and vacation rentals near Middle Jo-Mary Lake 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 Middle Jo-Mary Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 767 acres |
No bathymetric survey has been published for Middle Jo-Mary Lake, so its depth is not documented here.
Fishing Middle Jo-Mary Lake
Nearby Lakes in Penobscot County
Frequently asked questions about Middle Jo-Mary Lake
Where is Middle Jo-Mary Lake?
- Middle Jo-Mary Lake 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 Middle Jo-Mary Lake?
- Middle Jo-Mary Lake in Penobscot County, Maine is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 767 acres.
Is Middle Jo-Mary Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Middle Jo-Mary 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 Middle Jo-Mary Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.