San Andreas Lake
San Mateo County, California486 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Limited data
San Andreas Lake in San Mateo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 486 acres.
San Andreas Lake is a 486-acre lake in San Mateo County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency. 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 San Andreas 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 San Andreas Lake
These are the measurements SWRCB publishes for San Andreas 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 San Andreas Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
486 acres
Shoreline
8.6 mi
No bathymetric survey has been published for San Andreas Lake, so its depth is not documented here.
Stays via Stay22
Stays near San Andreas Lake
Compare lakeside cabins, hotels, and vacation rentals near San Andreas Lake in San Mateo 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.
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Fishing San Andreas Lake
Nearby Lakes in San Mateo County
Frequently asked questions about San Andreas Lake
Where is San Andreas Lake?
- San Andreas Lake is a lake in San Mateo County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of San Andreas Lake?
- San Andreas Lake in San Mateo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 486 acres.
Is San Andreas 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
Measurements for San Andreas Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.