John Lake
Copper River County, Alaska147 acresView mapDirections
No nutrient or algae sampling on record from Alaska DEC for this lake.
- 13 ft mean depth (modelled)
John Lake in Copper River County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 147 acres.
John Lake is a 147-acre lake in Copper River County, Alaska with an estimated average depth of about 13 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. 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 John Lake is safe to swim in today is a call for the Alaska Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for John Lake
These are the measurements Alaska DEC publishes for John 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.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Mean depth
~13 ft est.
Surface area
147 acres
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Alaska has not published bathymetry for John Lake.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Mean depth
~13 ft est.
Modelled from terrain, not sounded
Shoreline
3.4 mi
HydroLAKES / HydroSHEDS
Elevation
2,743 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Stays near John Lake
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Nearby Lakes in Copper River County
Frequently asked questions about John Lake
Where is John Lake?
- John Lake is a lake in Copper River County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of John Lake?
- John Lake in Copper River County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 147 acres.
Is John Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is John Lake?
- No published bathymetric survey covers John Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 13 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 147 acres.
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Where this data comes from
Measurements for John Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)