Mud Lake
St. Lawrence County, New York535 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Oxygen depletion (low DO)
Mud Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 535 acres.
Mud Lake is a 535-acre lake in St. Lawrence County, New York.
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. Mud Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
Whether Mud 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 Mud Lake
These are the measurements NY DEC publishes for Mud 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 Mud Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
535 acres
Shoreline
4.7 mi
No bathymetric survey has been published for Mud Lake, so its depth is not documented here.
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Stays near Mud Lake
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Fishing Mud Lake
EPA Impairment Status
Mud Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit NY0906-0028 · Official waterbody report
Nearby Lakes in St. Lawrence County
Frequently asked questions about Mud Lake
Where is Mud Lake?
- Mud 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 Mud Lake?
- Mud Lake in St. Lawrence County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 535 acres.
Is Mud Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mud Lake is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.
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Where this data comes from
Measurements for Mud Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database