Where is Lake Dorothy?

Lake Dorothy is a lake in King County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.

Lake Dorothy

King County, Washington261 acresView map Directions

No nutrient or algae sampling on record from Washington Ecology for this lake.

Area

261 acres

Surface area

Shoreline

5.2 mi

Measured length

Impaired · Dioxins

See the measurements Directions Where to stay

Lake Dorothy in King County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 261 acres.

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Lake Dorothy is a 261-acre lake in King County, Washington.

Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake Dorothy is listed impaired under Clean Water Act §303(d) (IR 5) for dioxins. Check local advisories before you swim.

Whether Lake Dorothy 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.

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Water quality measurements for Lake Dorothy

These are the measurements Washington Ecology publishes for Lake Dorothy, 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 Dorothy

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

261 acres

Shoreline

5.2 mi

No bathymetric survey has been published for Lake Dorothy, so its depth is not documented here.

Stays via Stay22

Stays near Lake Dorothy

Compare lakeside cabins, hotels, and vacation rentals near Lake Dorothy 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.

Top-rated places to stay near Lake Dorothy

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Fishing Lake Dorothy

→ Lake Dorothy fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Lake Dorothy is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 5).

Causes of impairment

Dioxins

Designated uses not supporting: Drinking water, Fish consumption.

Source: EPA ATTAINS assessment unit WA17110009001084_001_001 · Official waterbody report

Nearby Lakes in King County

Bear Lake1 miView →Deer Lake1.3 miView →Snoqualmie Lake1.9 miView →Lake Malachite2.6 miView →Dream Lake2.5 miView →Copper Lake2.7 miView →

Frequently asked questions about Lake Dorothy

Where is Lake Dorothy?: Lake Dorothy 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 Dorothy?: Lake Dorothy in King County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 261 acres.
Is Lake Dorothy safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Dorothy is listed impaired under Clean Water Act §303(d) (IR 5) for dioxins. Check local advisories before you swim.