Upper Jo-Mary Lake
Piscataquis County, Maine1,866 acresView mapDirections
No nutrient or algae sampling on record from Maine DEP for this lake.
- 72 ft max depth
Upper Jo-Mary Lake in Piscataquis County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 72 ft. Surface area: 1866 acres.
Upper Jo-Mary Lake is a 1,866-acre lake in Piscataquis County, Maine with a maximum depth of 72 feet (32-foot average).
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Upper Jo-Mary Lake is good for
From access and monitoring records, not editorial picks.
- Deep water72 ft surveyed max depth
- Big water1,866 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper Jo-Mary Lake is safe to swim in today is a call for the Maine Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Upper Jo-Mary Lake
These are the measurements Maine DEP publishes for Upper Jo-Mary Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Upper Jo-Mary Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
72 ft
Average depth
32 ft
Surface area
1,866 acres
Shoreline
12.8 mi
The depth above comes from a bathymetric survey of this lake, not from a regional estimate.
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Fishing Upper Jo-Mary Lake
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Frequently asked questions about Upper Jo-Mary Lake
Where is Upper Jo-Mary Lake?
- Upper Jo-Mary Lake is a lake in Piscataquis County, Maine. Its water-quality measurements are published by Maine DEP and shown on this page as reported.
What is the water quality of Upper Jo-Mary Lake?
- Upper Jo-Mary Lake in Piscataquis County, Maine has water-quality measurements published by Maine DEP, shown here as reported. Maximum depth: 72 ft. Surface area: 1866 acres.
Is Upper Jo-Mary Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Upper Jo-Mary Lake?
- Upper Jo-Mary Lake has a maximum depth of 72 feet and an average depth of 32 feet. The lake covers 1866 acres.
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Where this data comes from
Measurements for Upper Jo-Mary Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.