Lake Simtustus
Lake Simtustus in Jefferson County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 553 acres.
- Area
- 553 acres
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Why Lake Simtustus has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Simtustus, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Oregon DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Simtustus is a 553-acre lake in Jefferson County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lake Simtustus
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay 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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Planning a whole trip? See where to stay at Oregon’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 553 acres |
No bathymetric survey has been published for Lake Simtustus, so its depth is not documented here.
Fishing Lake Simtustus
Nearby Lakes in Jefferson County
Frequently asked questions about Lake Simtustus
Where is Lake Simtustus?
- Lake Simtustus is a lake in Jefferson County, Oregon. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Simtustus?
- Lake Simtustus in Jefferson County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 553 acres.
Is Lake Simtustus safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Simtustus is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Lake Simtustus across LakeQuality
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Where this data comes from
Measurements for Lake Simtustus come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.