Grass River Flow
St. Lawrence County, New York185 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- 8 ft max depth
Grass River Flow in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 7.9 ft. Surface area: 185 acres.
Grass River Flow is a 185-acre lake in St. Lawrence County, New York with a maximum depth of 8 feet (2-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 Grass River Flow 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 Grass River Flow
These are the measurements NY DEC publishes for Grass River Flow, 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 Grass River Flow
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
7.9 ft
Average depth
1.6 ft
Surface area
185 acres
Shoreline
5 mi
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Frequently asked questions about Grass River Flow
Where is Grass River Flow?
- Grass River Flow 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 Grass River Flow?
- Grass River Flow in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 7.9 ft. Surface area: 185 acres.
Is Grass River Flow safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Grass River Flow?
- Grass River Flow has a maximum depth of 7.9 feet and an average depth of 1.6 feet. The lake covers 185 acres.
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Where this data comes from
Measurements for Grass River Flow come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.