Twin Sisters Lakes
Twin Sisters Lakes in Yakima County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 102 acres.
- Area
- 102 acres
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Why Twin Sisters Lakes 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 Twin Sisters Lakes, 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.
Twin Sisters Lakes is a 102-acre lake in Yakima 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 Twin Sisters Lakes
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 Twin Sisters Lakes
Compare lakeside cabins, hotels, and vacation rentals near Twin Sisters Lakes in Yakima 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 Twin Sisters Lakes
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 102 acres |
No bathymetric survey has been published for Twin Sisters Lakes, so its depth is not documented here.
Fishing Twin Sisters Lakes
Nearby Lakes in Yakima County
Frequently asked questions about Twin Sisters Lakes
Where is Twin Sisters Lakes?
- Twin Sisters Lakes is a lake in Yakima 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 Twin Sisters Lakes?
- Twin Sisters Lakes in Yakima County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 102 acres.
Is Twin Sisters Lakes safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Twin Sisters Lakes is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Twin Sisters Lakes across LakeQuality
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Where this data comes from
Measurements for Twin Sisters Lakes come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.