Lake Isabel
Lake Isabel in Snohomish County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 168 acres.
- Area
- 168 acres
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Why Lake Isabel 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 Isabel, 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 Isabel is a 168-acre lake in Snohomish County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Lake Isabel 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 Lake Isabel
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 Isabel
Compare lakeside cabins, hotels, and vacation rentals near Lake Isabel in Snohomish 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 Isabel
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 168 acres |
No bathymetric survey has been published for Lake Isabel, so its depth is not documented here.
Fishing Lake Isabel
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Frequently asked questions about Lake Isabel
Where is Lake Isabel?
- Lake Isabel is a lake in Snohomish 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 Isabel?
- Lake Isabel in Snohomish County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 168 acres.
Is Lake Isabel safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Isabel 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 Isabel come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.