Lake is a productive, nutrient-rich eutrophic lake in Thurston County, Washington. Water quality is graded F based on 2 sampling years through 2025. Compared to the 18 other monitored lakes in Thurston County, Lake ranks #19 for water quality.
Source: EPA Water Quality Portal sampling records, Washington DNR, last sampled 2025-10-21. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
No clarity data. Phosphorus level: 126.5 µg/L. Chlorophyll-a: 34 µg/L. Trophic State Index: 70.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 126.5 µg/L | F |
| Chlorophyll-a (Algae) | 34 µg/L | F |
| Trophic State Index (TSI) | 70 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake
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Fishing Lake
Location
County Ranking
Ranked #19 of 19 lakes in Thurston County
Cleaner Lakes Within 30 Miles
Lake holds Grade F. 3 nearby lakes hold higher grades.
- BLake: Offutt LakeThurston County · 17.9 mi · Two grade letters higher (F → B)
- BLake: Pattison LakeThurston County · 18.7 mi · Two grade letters higher (F → B)
- DNla LakeThurston County · 1.2 mi · Higher grade (F → D)
Nearby Lakes in Thurston County
Explore Lake across LakeGrade
More Washington Lake Rankings
Other Grade F Lakes in Washington
Eutrophic Lakes in Washington
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-21
Monitoring stations: 1