Lake Number Twelve
King County, Washington41 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
- Impaired · Nuisance exotic species
Lake Number Twelve in King County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 41 acres.
Lake Number Twelve is a 41-acre lake in King County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Lake Number Twelve is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
Whether Lake Number Twelve is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Number Twelve
These are the measurements Washington Ecology publishes for Lake Number Twelve, 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 Number Twelve
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
41 acres
Shoreline
1.1 mi
No bathymetric survey has been published for Lake Number Twelve, so its depth is not documented here.
Stays via Stay22
Stays near Lake Number Twelve
Compare lakeside cabins, hotels, and vacation rentals near Lake Number Twelve in King County, Washington — 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 Number Twelve
EPA Impairment Status
Lake Number Twelve is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 4C).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit WA17110012006079_001_001 · Official waterbody report
Nearby Lakes in King County
Frequently asked questions about Lake Number Twelve
Where is Lake Number Twelve?
- Lake Number Twelve is a lake in King County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Lake Number Twelve?
- Lake Number Twelve in King County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 41 acres.
Is Lake Number Twelve safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Number Twelve is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
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Where this data comes from
Measurements for Lake Number Twelve 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