Long Lake
St. Lawrence County, New York38 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- 25 ft max depth
Long Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 24.9 ft. Surface area: 38 acres.
Long Lake is a 38-acre lake in St. Lawrence County, New York with a maximum depth of 25 feet (10-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Long Lake 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 Long Lake
These are the measurements NY DEC publishes for Long 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 Long Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
24.9 ft
Average depth
9.8 ft
Surface area
38 acres
Shoreline
1.5 mi
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Fishing Long Lake
Nearby Lakes in St. Lawrence County
Frequently asked questions about Long Lake
Where is Long Lake?
- Long Lake is a lake in St. Lawrence 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 Long Lake?
- Long Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 24.9 ft. Surface area: 38 acres.
Is Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Long Lake?
- Long Lake has a maximum depth of 24.9 feet and an average depth of 9.8 feet. The lake covers 38 acres.
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Where this data comes from
Measurements for Long Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.