San Antonio Reservoir
Alameda County, California770 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
San Antonio Reservoir in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 770 acres.
San Antonio Reservoir is a 770-acre lake in Alameda County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether San Antonio Reservoir 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 San Antonio Reservoir
These are the measurements SWRCB publishes for San Antonio Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about San Antonio Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
770 acres
Shoreline
14.1 mi
No bathymetric survey has been published for San Antonio Reservoir, so its depth is not documented here.
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Stays near San Antonio Reservoir
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Frequently asked questions about San Antonio Reservoir
Where is San Antonio Reservoir?
- San Antonio Reservoir is a lake in Alameda County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of San Antonio Reservoir?
- San Antonio Reservoir in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 770 acres.
Is San Antonio Reservoir 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
Measurements for San Antonio Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.