Mapes Reservoir
Modoc County, California26 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
Mapes Reservoir in Modoc County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 26 acres.
Mapes Reservoir is a 26-acre lake in Modoc 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 Mapes 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 Mapes Reservoir
These are the measurements SWRCB publishes for Mapes 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 Mapes Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
26 acres
Shoreline
2 mi
No bathymetric survey has been published for Mapes Reservoir, so its depth is not documented here.
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Frequently asked questions about Mapes Reservoir
Where is Mapes Reservoir?
- Mapes Reservoir is a lake in Modoc County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Mapes Reservoir?
- Mapes Reservoir in Modoc County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 26 acres.
Is Mapes 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 Mapes Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.