Lake John
Sullivan County, Pennsylvania56 acresView mapDirections
No nutrient or algae sampling on record from PA DEP for this lake.
Lake John in Sullivan County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Surface area: 56 acres.
Lake John is a 56-acre lake in Sullivan County, Pennsylvania.
Source: EPA Water Quality Portal sampling records, PA DEP. 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 John is safe to swim in today is a call for the Pennsylvania Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake John
These are the measurements PA DEP publishes for Lake John, 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 John
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
56 acres
Shoreline
1.7 mi
No bathymetric survey has been published for Lake John, so its depth is not documented here.
Stays via Stay22
Stays near Lake John
Compare lakeside cabins, hotels, and vacation rentals near Lake John in Sullivan County, Pennsylvania — 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 John
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Frequently asked questions about Lake John
Where is Lake John?
- Lake John is a lake in Sullivan County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.
What is the water quality of Lake John?
- Lake John in Sullivan County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Surface area: 56 acres.
Is Lake John 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 John come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.