Main Reservoir
Jefferson County, Colorado43 acresView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
Main Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 43 acres.
Main Reservoir is a 43-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 Main 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 Main Reservoir
These are the measurements Colorado WQCD publishes for Main 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 Main Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
43 acres
Shoreline
1.2 mi
No bathymetric survey has been published for Main Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Main Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Main Reservoir in Jefferson County, Colorado — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Frequently asked questions about Main Reservoir
Where is Main Reservoir?
- Main 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 Main Reservoir?
- Main Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 43 acres.
Is Main 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 Main Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.