Bull Run Reservoir Number One
Bull Run Reservoir Number One in Multnomah County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 426 acres.
- Area
- 426 acres
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Why Bull Run Reservoir Number One 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 Bull Run Reservoir Number One, 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.
Bull Run Reservoir Number One is a 426-acre lake in Multnomah 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 Bull Run Reservoir Number One
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 Bull Run Reservoir Number One
Compare lakeside cabins, hotels, and vacation rentals near Bull Run Reservoir Number One in Multnomah 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 Bull Run Reservoir Number One
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 426 acres |
No bathymetric survey has been published for Bull Run Reservoir Number One, so its depth is not documented here.
Fishing Bull Run Reservoir Number One
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Frequently asked questions about Bull Run Reservoir Number One
Where is Bull Run Reservoir Number One?
- Bull Run Reservoir Number One is a lake in Multnomah 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 Bull Run Reservoir Number One?
- Bull Run Reservoir Number One in Multnomah County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 426 acres.
Is Bull Run Reservoir Number One safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Bull Run Reservoir Number One is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Bull Run Reservoir Number One come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.