Big Sage Reservoir
Big Sage Reservoir in Modoc County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 5618 acres.
- Area
- 5,618 acres
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Why Big Sage Reservoir 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 Big Sage Reservoir, 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.
Big Sage Reservoir is a 5,618-acre lake in Modoc County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Big Sage Reservoir
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 Big Sage Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Big Sage Reservoir in Modoc 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 Big Sage Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 5,618 acres |
No bathymetric survey has been published for Big Sage Reservoir, so its depth is not documented here.
Fishing Big Sage Reservoir
Nearby Lakes in Modoc County
Frequently asked questions about Big Sage Reservoir
Where is Big Sage Reservoir?
- Big Sage Reservoir is a lake in Modoc 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 Big Sage Reservoir?
- Big Sage Reservoir in Modoc County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 5618 acres.
Is Big Sage Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Big Sage Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Big Sage Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.