Eagle Lake
Lassen County, CaliforniaView mapDirections
SWRCB publishes the water-quality measurements for Eagle Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
Eagle Lake in Lassen County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 248 µg/L.
Eagle Lake is a lake in Lassen County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-09-29. Methodology: how these readings are compared.
Swimming conditions
Readings onlyElevated nutrients
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Eagle Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Eagle Lake is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Eagle Lake
These are the measurements SWRCB publishes for Eagle Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 248 µg/L.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 248µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Eagle Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Eagle Lake
Compare lakeside cabins, hotels, and vacation rentals near Eagle Lake in Lassen County, California — 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Eagle Lake are listed below.
Top-rated places to stay near Eagle Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
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Fishing Eagle Lake
EPA Impairment Status
Eagle Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit CAL6373200019980806111117 · Official waterbody report
Nearby Lakes in Lassen County
Frequently asked questions about Eagle Lake
Where is Eagle Lake?
- Eagle Lake is a lake in Lassen County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Eagle Lake?
- Eagle Lake in Lassen County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 248 µg/L.
Is Eagle Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Eagle Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
1 measurement from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- USGS Oregon Water Science Center
USGS-OR1 sample · 2023
Analytical methods
- YSI Environmental, sensor 6136
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database