Long Pond
Lewis County, New York149 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Mercury
- 59 ft max depth
Long Pond in Lewis County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 59.1 ft. Surface area: 149 acres.
Long Pond is a 149-acre lake in Lewis County, New York with a maximum depth of 59 feet (30-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What Long Pond is good for
From access and monitoring records, not editorial picks.
- Deep water59.1 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Long Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Long Pond 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 Pond
These are the measurements NY DEC publishes for Long Pond, 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 Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
59.1 ft
Average depth
29.5 ft
Surface area
149 acres
Shoreline
3.6 mi
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Fishing Long Pond
EPA Impairment Status
Long Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY0905-0058 · Official waterbody report
Nearby Lakes in Lewis County
Frequently asked questions about Long Pond
Where is Long Pond?
- Long Pond is a lake in Lewis 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 Pond?
- Long Pond in Lewis County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 59.1 ft. Surface area: 149 acres.
Is Long Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Long Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Long Pond?
- Long Pond has a maximum depth of 59.1 feet and an average depth of 29.5 feet. The lake covers 149 acres.
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Where this data comes from
Measurements for Long Pond 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