Lake Sacajawea
Lake Sacajawea in Walla Walla County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 8146 acres.
- Area
- 8,146 acres
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Why Lake Sacajawea 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 Sacajawea, 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 WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Sacajawea is a 8,146-acre lake in Walla Walla County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology, 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 Sacajawea
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 Sacajawea
Compare lakeside cabins, hotels, and vacation rentals near Lake Sacajawea in Walla Walla County, Washington — 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 Sacajawea
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 8,146 acres |
No bathymetric survey has been published for Lake Sacajawea, so its depth is not documented here.
Fishing Lake Sacajawea
Nearby Lakes in Walla Walla County
Frequently asked questions about Lake Sacajawea
Where is Lake Sacajawea?
- Lake Sacajawea is a lake in Walla Walla County, Washington. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Sacajawea?
- Lake Sacajawea in Walla Walla County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 8146 acres.
Is Lake Sacajawea safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Sacajawea 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 Lake Sacajawea come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.