Upper San Leandro Reservoir
Upper San Leandro Reservoir in Alameda County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 705 acres.
- Area
- 705 acres
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Why Upper San Leandro 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 Upper San Leandro 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.
Upper San Leandro Reservoir is a 705-acre lake in Alameda 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 Upper San Leandro 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 Upper San Leandro Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Upper San Leandro Reservoir in Alameda 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 Upper San Leandro Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 705 acres |
No bathymetric survey has been published for Upper San Leandro Reservoir, so its depth is not documented here.
Fishing Upper San Leandro Reservoir
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Frequently asked questions about Upper San Leandro Reservoir
Where is Upper San Leandro Reservoir?
- Upper San Leandro Reservoir is a lake in Alameda 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 Upper San Leandro Reservoir?
- Upper San Leandro Reservoir in Alameda County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 705 acres.
Is Upper San Leandro Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Upper San Leandro 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 Upper San Leandro Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.