Lower Blue Lake
Lake County, CaliforniaView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Limited data
Lower Blue Lake in Lake County, California has water-quality measurements published by SWRCB, shown here as reported.
Lower Blue Lake is a lake in Lake County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-10-05. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lower Blue 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 Lower Blue Lake
These are the measurements SWRCB publishes for Lower Blue 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.
Ask about Lower Blue Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Lower Blue Lake
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Fishing Lower Blue Lake
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Frequently asked questions about Lower Blue Lake
Where is Lower Blue Lake?
- Lower Blue Lake is a lake in Lake County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Lower Blue Lake?
- Lower Blue Lake in Lake County, California has water-quality measurements published by SWRCB, shown here as reported.
Is Lower Blue Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. 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 California Water Science Center
USGS-CA1 sample · 2023
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.