Twitchell Reservoir
San Luis Obispo County, California156 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
Twitchell Reservoir in San Luis Obispo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 156 acres.
Twitchell Reservoir is a 156-acre lake in San Luis Obispo 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 Twitchell 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 Twitchell Reservoir
These are the measurements SWRCB publishes for Twitchell 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.
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Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
156 acres
No bathymetric survey has been published for Twitchell Reservoir, so its depth is not documented here.
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Frequently asked questions about Twitchell Reservoir
Where is Twitchell Reservoir?
- Twitchell Reservoir is a lake in San Luis Obispo County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Twitchell Reservoir?
- Twitchell Reservoir in San Luis Obispo County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 156 acres.
Is Twitchell 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 Twitchell Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.