Ralston Reservoir
Jefferson County, Colorado154 acresView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
Ralston Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 154 acres.
Ralston Reservoir is a 154-acre lake in Jefferson County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE. 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 Ralston Reservoir is safe to swim in today is a call for the Water Quality Control Division of the Colorado Department of Public Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Ralston Reservoir
These are the measurements Colorado WQCD publishes for Ralston 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
154 acres
Shoreline
4.3 mi
No bathymetric survey has been published for Ralston Reservoir, so its depth is not documented here.
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Frequently asked questions about Ralston Reservoir
Where is Ralston Reservoir?
- Ralston Reservoir is a lake in Jefferson County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Ralston Reservoir?
- Ralston Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 154 acres.
Is Ralston 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 Ralston Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.