Where is Lake Simtustus?

Lake Simtustus is a lake in Jefferson County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.

Lake Simtustus

Jefferson County, Oregon553 acresView map Directions

No nutrient or algae sampling on record from Oregon DEQ for this lake.

Area

553 acres

Surface area

Shoreline

19.8 mi

Measured length

Impaired · Algal growth

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Lake Simtustus in Jefferson County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 553 acres.

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Lake Simtustus is a 553-acre lake in Jefferson County, Oregon.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake Simtustus is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pH / acidity, temperature. Check local advisories before you swim.

Whether Lake Simtustus is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lake Simtustus

These are the measurements Oregon DEQ publishes for Lake Simtustus, 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 Simtustus

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

Lake Details

Surface area

553 acres

Shoreline

19.8 mi

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

Stays via Stay22

Stays near Lake Simtustus

Compare lakeside cabins, hotels, and vacation rentals near Lake Simtustus in Jefferson County, Oregon — 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 Simtustus

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Fishing Lake Simtustus

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

EPA Impairment Status

Lake Simtustus is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growthpH / acidityTemperature

Designated uses not supporting: Aquatic life, Other.

Source: EPA ATTAINS assessment unit OR_LK_1707030601_02_100118 · Official waterbody report

Nearby Lakes in Jefferson County

Round Butte Dam Forebay Lake5.6 ft clear · Mesotrophic3.6 miView →Pelton Regulating Reservoir4.3 miView →Deschutes River Arm Lake4.6 ft clear · Mesotrophic6.1 miView →Billy Chinook Reservoir4.4 ft clear · Mesotrophic6.4 miView →Lake Billy Chinook Deschutes R Arm @ Floating StationEutrophic6.4 miView →Crooked River Arm LakeEutrophic—View →

Frequently asked questions about Lake Simtustus

Where is Lake Simtustus?: Lake Simtustus is a lake in Jefferson County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Lake Simtustus?: Lake Simtustus in Jefferson County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 553 acres.
Is Lake Simtustus safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake Simtustus is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, pH / acidity, temperature. Check local advisories before you swim.