Black Rock Reservoir
Fresno County, California33 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
Black Rock Reservoir in Fresno County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 33 acres.
Black Rock Reservoir is a 33-acre lake in Fresno 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 Black Rock 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 Black Rock Reservoir
These are the measurements SWRCB publishes for Black Rock 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 Black Rock Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
33 acres
Shoreline
1.5 mi
No bathymetric survey has been published for Black Rock Reservoir, so its depth is not documented here.
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Frequently asked questions about Black Rock Reservoir
Where is Black Rock Reservoir?
- Black Rock Reservoir is a lake in Fresno County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Black Rock Reservoir?
- Black Rock Reservoir in Fresno County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 33 acres.
Is Black Rock 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 Black Rock Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.