Lake Billy Chinook Deschutes R Arm @ Floating Station
Jefferson County, OregonView mapDirections
Nutrients and algae run above the regional average.
- Eutrophic
- Impaired · Algal growth
- #10 of 14 in the county
- Limited data
Lake Billy Chinook Deschutes R Arm @ Floating Station in Jefferson County, Oregon has a water quality grade of D (Nutrient-rich). Phosphorus: 35 µg/L. Chlorophyll-a (algae): 27.7 µg/L.
- Type
- Eutrophic
- Phosphorus
- 35 µg/L
- Chlorophyll-a
- 27.7 µg/L
- Trend
- ↑ Improving
Stays via Stay22
Stays near Lake Billy Chinook Deschutes R Arm @ Floating Station
Compare lakeside cabins, hotels, and vacation rentals near Lake Billy Chinook Deschutes R Arm @ Floating Station in Jefferson County, Oregon — 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Billy Chinook Deschutes R Arm @ Floating Station are listed below.
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Watch Lake Billy Chinook Deschutes R Arm @ Floating Station’s letter
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Lake Billy Chinook Deschutes R Arm @ Floating Station is a productive, nutrient-rich eutrophic lake in Jefferson County, Oregon. Water quality is graded D based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Compared to the 13 other monitored lakes in Jefferson County, Lake Billy Chinook Deschutes R Arm @ Floating Station ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled 2025-09-24. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The D is nutrients and algae, not a swimming clearance. Lake Billy Chinook Deschutes R Arm @ Floating Station is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, hydrologic alteration, pH / acidity. Check local advisories before you swim.
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Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus 35 µg/L. Chlorophyll-a 27.7 µg/L. TSI 59. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 35 µg/L | Fair |
| Chlorophyll-a (Algae) | 27.7 µg/L | Poor |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
→ Lake Billy Chinook Deschutes R Arm @ Floating Station water level: the live USGS gauge reading
Fishing Lake Billy Chinook Deschutes R Arm @ Floating Station
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.063 m/yr | 2 |
| Phosphorus | ↑ Improving | -2.5 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +2.63 µg/L/yr | 3 |
EPA Impairment Status
Lake Billy Chinook Deschutes R Arm @ Floating Station is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit OR_LK_1707030111_02_100151 · Official waterbody report · Matched by proximity (1.05 km)
County Ranking
Ranked #10 of 14 lakes in Jefferson County
Nearby Lakes With Higher Grades
Lake Billy Chinook Deschutes R Arm @ Floating Station holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Jefferson County
Frequently asked questions about Lake Billy Chinook Deschutes R Arm @ Floating Station
Where is Lake Billy Chinook Deschutes R Arm @ Floating Station?
- Lake Billy Chinook Deschutes R Arm @ Floating Station is a lake in Jefferson County, Oregon. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Billy Chinook Deschutes R Arm @ Floating Station?
- Lake Billy Chinook Deschutes R Arm @ Floating Station in Jefferson County, Oregon has a water quality grade of D (Nutrient-rich). Phosphorus: 35 µg/L. Chlorophyll-a (algae): 27.7 µg/L.
Is Lake Billy Chinook Deschutes R Arm @ Floating Station safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Lake Billy Chinook Deschutes R Arm @ Floating Station is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, hydrologic alteration, pH / acidity. Check local advisories before you swim.
Explore Lake Billy Chinook Deschutes R Arm @ Floating Station across LakeQuality
More Oregon Lake Rankings
Other Grade D Lakes in Oregon
Eutrophic Lakes in Oregon
Where this data comes from
772 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Department of Environmental Quality - State of Oregon
OREGONDEQ772 samples · 2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 10200 H ~ Chlorophyll a-b-c Determination
- YSI
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database