Masonry Pool
Masonry Pool in King County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 179 acres.
- Area
- 179 acres
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Why Masonry Pool 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 Masonry Pool, 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.
Masonry Pool is a 179-acre lake in King County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Masonry Pool 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 Masonry Pool
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 Masonry Pool
Compare lakeside cabins, hotels, and vacation rentals near Masonry Pool in King 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 Masonry Pool
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 179 acres |
No bathymetric survey has been published for Masonry Pool, so its depth is not documented here.
Fishing Masonry Pool
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Frequently asked questions about Masonry Pool
Where is Masonry Pool?
- Masonry Pool is a lake in King 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 Masonry Pool?
- Masonry Pool in King County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 179 acres.
Is Masonry Pool safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Masonry Pool 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 Masonry Pool come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.