Grants Lagoon
Lake and Peninsula County, Alaska535 acresView mapDirections
No nutrient or algae sampling on record from Alaska DEC for this lake.
- 5 ft mean depth (modelled)
Grants Lagoon in Lake and Peninsula County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 535 acres.
Grants Lagoon is a 535-acre lake in Lake and Peninsula County, Alaska with an estimated average depth of about 5 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 Grants Lagoon 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 Grants Lagoon
These are the measurements Alaska DEC publishes for Grants Lagoon, 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
~5 ft est.
Surface area
535 acres
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Alaska has not published bathymetry for Grants Lagoon.
Lake Size & Watershed
Watershed (drainage) area
8 sq mi
HydroLAKES / HydroSHEDS
Mean depth
~5 ft est.
Modelled from terrain, not sounded
Shoreline
11.2 mi
HydroLAKES / HydroSHEDS
Elevation
46 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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Frequently asked questions about Grants Lagoon
Where is Grants Lagoon?
- Grants Lagoon is a lake in Lake and Peninsula County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of Grants Lagoon?
- Grants Lagoon in Lake and Peninsula County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 535 acres.
Is Grants Lagoon safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Grants Lagoon?
- No published bathymetric survey covers Grants Lagoon, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 5 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 535 acres.
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Where this data comes from
Measurements for Grants Lagoon 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)