Langdon Lake
Langdon Lake in Umatilla County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 49 acres.
- Area
- 49 acres
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Why Langdon Lake 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 Langdon Lake, 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.
Langdon Lake is a 49-acre lake in Umatilla County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Langdon Lake water quality
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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 Langdon Lake
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 Langdon Lake
Compare lakeside cabins, hotels, and vacation rentals near Langdon Lake in Umatilla 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 Langdon Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 49 acres |
No bathymetric survey has been published for Langdon Lake, so its depth is not documented here.
Fishing Langdon Lake
Nearby Lakes in Umatilla County
Frequently asked questions about Langdon Lake
Where is Langdon Lake?
- Langdon Lake is a lake in Umatilla 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 Langdon Lake?
- Langdon Lake in Umatilla County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 49 acres.
Is Langdon Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Langdon Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Langdon Lake across LakeQuality
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Where this data comes from
Measurements for Langdon Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.