Malheur Reservoir
Malheur Reservoir in Malheur County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 760 acres.
- Area
- 760 acres
- Public access
- Yes
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Why Malheur Reservoir 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 Malheur Reservoir, 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.
Malheur Reservoir is a 760-acre lake in Malheur County, Oregon. Limited fish-species data available. Public access is available with 1 public boat landing.
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 Malheur Reservoir
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 Malheur Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Malheur Reservoir in Malheur 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 Malheur Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 760 acres |
| Public Access | Yes |
No bathymetric survey has been published for Malheur Reservoir, so its depth is not documented here.
Recreation & Access
- Malheur ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Malheur Reservoir
Nearby Lakes in Malheur County
Frequently asked questions about Malheur Reservoir
Where is Malheur Reservoir?
- Malheur Reservoir is a lake in Malheur 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 Malheur Reservoir?
- Malheur Reservoir in Malheur County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 760 acres.
Is Malheur Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Malheur Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Malheur Reservoir?
- Malheur Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Malheur Reservoir. Public access is listed as yes.
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Where this data comes from
Measurements for Malheur Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory