Westchester Lagoon
Anchorage County, Alaska59 acresView mapDirections
No nutrient or algae sampling on record from Alaska DEC for this lake.
- Impaired · Pathogens (E. coli, fecal)
- 11 ft mean depth (modelled)
Westchester Lagoon in Anchorage County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 59 acres.
Westchester Lagoon is a 59-acre lake in Anchorage County, Alaska with an estimated average depth of about 11 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Westchester Lagoon is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
Whether Westchester 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 Westchester Lagoon
These are the measurements Alaska DEC publishes for Westchester 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.
Ask about Westchester Lagoon
Answers come straight from the public measurements and survey records on this page.
Lake Details
Mean depth
~11 ft est.
Surface area
59 acres
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Alaska has not published bathymetry for Westchester Lagoon.
Lake Size & Watershed
Watershed (drainage) area
16 sq mi
HydroLAKES / HydroSHEDS
Mean depth
~11 ft est.
Modelled from terrain, not sounded
Shoreline
1.3 mi
HydroLAKES / HydroSHEDS
Elevation
23 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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Fishing Westchester Lagoon
EPA Impairment Status
Westchester Lagoon is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Drinking water.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit AK_L_2040108_060 · Official waterbody report
Nearby Lakes in Anchorage County
Frequently asked questions about Westchester Lagoon
Where is Westchester Lagoon?
- Westchester Lagoon is a lake in Anchorage County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of Westchester Lagoon?
- Westchester Lagoon in Anchorage County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 59 acres.
Is Westchester Lagoon safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Westchester Lagoon is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
How deep is Westchester Lagoon?
- No published bathymetric survey covers Westchester Lagoon, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 11 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 59 acres.
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Where this data comes from
Measurements for Westchester Lagoon 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
Lake size & watershed from HydroLAKES (HydroSHEDS)