Blue Lake
Blue Lake in Lassen County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 161 acres.
- Area
- 161 acres
- Public access
- Yes
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Why Blue Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Blue Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Blue Lake is a 161-acre lake in Lassen County, California. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Blue Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Blue Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Blue Lake
Compare lakeside cabins, hotels, and vacation rentals near Blue 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.
Top-rated places to stay near Blue Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 161 acres |
| Public Access | Yes |
No bathymetric survey has been published for Blue Lake, so its depth is not documented here.
Recreation & Access
- Blue LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Blue Lake
Nearby Lakes in Lassen County
Frequently asked questions about Blue Lake
Where is Blue Lake?
- Blue Lake is a lake in Lassen County, California. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Blue Lake?
- Blue Lake in Lassen County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 161 acres.
Is Blue Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Blue Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Blue Lake?
- Blue Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Blue Lake. Public access is listed as yes.
Explore Blue Lake across LakeQuality
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Where this data comes from
Measurements for Blue Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory