Crooked River Arm Lake is a productive, nutrient-rich eutrophic lake in Jefferson County, Oregon. Water quality is graded D based on 1 sampling years through 2021. Compared to the 14 other monitored lakes in Jefferson County, Crooked River Arm Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Oregon DNR, last sampled 2021-10-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
No clarity data. Chlorophyll-a: 24.6 µg/L. Trophic State Index: 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 24.6 µg/L | D |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Crooked River Arm Lake
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Top-rated places to stay near Crooked River Arm Lake
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Fishing Crooked River Arm Lake
Location
County Ranking
Ranked #10 of 15 lakes in Jefferson County
Cleaner Lakes Within 30 Miles
Crooked River Arm Lake holds Grade D. 2 nearby lakes hold higher grades.
Nearby Lakes in Jefferson County
Explore Crooked River Arm Lake across LakeGrade
More Oregon Lake Rankings
Other Grade D Lakes in Oregon
Eutrophic Lakes in Oregon
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: 2021-10-20
Monitoring stations: 1