Lake Jefferson
Sullivan County, New York42 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
Lake Jefferson in Sullivan County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 42 acres.
Lake Jefferson is a 42-acre lake in Sullivan 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. Check local advisories before you swim.
Whether Lake Jefferson 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 Lake Jefferson
These are the measurements NY DEC publishes for Lake Jefferson, 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 Lake Jefferson
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
42 acres
Shoreline
2.7 mi
No bathymetric survey has been published for Lake Jefferson, so its depth is not documented here.
Stays via Stay22
Stays near Lake Jefferson
Compare lakeside cabins, hotels, and vacation rentals near Lake Jefferson in Sullivan County, New York — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Lake Jefferson
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Frequently asked questions about Lake Jefferson
Where is Lake Jefferson?
- Lake Jefferson is a lake in Sullivan 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 Lake Jefferson?
- Lake Jefferson in Sullivan County, New York has water-quality measurements published by NY DEC, shown here as reported. Surface area: 42 acres.
Is Lake Jefferson safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Lake Jefferson come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.