Tomhannock Reservoir
Rensselaer County, New York1,709 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- 50 ft max depth
Tomhannock Reservoir in Rensselaer County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 50 ft. Surface area: 1709 acres.
Tomhannock Reservoir is a 1,709-acre lake in Rensselaer County, New York with a maximum depth of 50 feet (23-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What Tomhannock Reservoir is good for
From access and monitoring records, not editorial picks.
- Deep water50 ft surveyed max depth
- Big water1,709 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Tomhannock Reservoir is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Tomhannock Reservoir
These are the measurements NY DEC publishes for Tomhannock Reservoir, 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 Tomhannock Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
50 ft
Average depth
23 ft
Surface area
1,709 acres
Shoreline
18.6 mi
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Fishing Tomhannock Reservoir
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Frequently asked questions about Tomhannock Reservoir
Where is Tomhannock Reservoir?
- Tomhannock Reservoir is a lake in Rensselaer County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Tomhannock Reservoir?
- Tomhannock Reservoir in Rensselaer County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 50 ft. Surface area: 1709 acres.
Is Tomhannock Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Tomhannock Reservoir?
- Tomhannock Reservoir has a maximum depth of 50 feet and an average depth of 23 feet. The lake covers 1709 acres.
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Where this data comes from
Measurements for Tomhannock Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.