Big Johnson Reservoir
El Paso County, Colorado274 acresView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
Big Johnson Reservoir in El Paso County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 274 acres.
Big Johnson Reservoir is a 274-acre lake in El Paso 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 Big Johnson 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 Big Johnson Reservoir
These are the measurements Colorado WQCD publishes for Big Johnson 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 Big Johnson Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
274 acres
Shoreline
2.7 mi
No bathymetric survey has been published for Big Johnson Reservoir, so its depth is not documented here.
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Stays near Big Johnson Reservoir
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Frequently asked questions about Big Johnson Reservoir
Where is Big Johnson Reservoir?
- Big Johnson Reservoir is a lake in El Paso County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Big Johnson Reservoir?
- Big Johnson Reservoir in El Paso County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 274 acres.
Is Big Johnson 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 Big Johnson Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.