Where is Blunn Reservoir?

Blunn Reservoir is a lake in Jefferson County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.

Blunn Reservoir

Jefferson County, Colorado163 acresView map Directions

No nutrient or algae sampling on record from Colorado WQCD for this lake.

Area

163 acres

Surface area

Shoreline

2.9 mi

Measured length

Impaired · Oxygen depletion (low DO)

See the measurements Directions Where to stay

Blunn Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 163 acres.

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Blunn Reservoir is a 163-acre lake in Jefferson County, Colorado.

Source: EPA Water Quality Portal sampling records, CDPHE. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Blunn Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.

Whether Blunn 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.

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Water quality measurements for Blunn Reservoir

These are the measurements Colorado WQCD publishes for Blunn 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 Blunn Reservoir

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

163 acres

Shoreline

2.9 mi

No bathymetric survey has been published for Blunn Reservoir, so its depth is not documented here.

Stays via Stay22

Stays near Blunn Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Blunn 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.

Top-rated places to stay near Blunn Reservoir

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Fishing Blunn Reservoir

→ Blunn Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Blunn Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Oxygen depletion (low DO)

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit COSPCL17a_A · Official waterbody report

Nearby Lakes in Jefferson County

Tucker Lake0.8 miView →Upper Long Lake1.4 miView →Ralston Reservoir1.9 miView →Leyden Lake2.5 miView →Hyatt Lake2.7 miView →Rocky Flats Lake3.5 miView →

Frequently asked questions about Blunn Reservoir

Where is Blunn Reservoir?: Blunn 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 Blunn Reservoir?: Blunn Reservoir in Jefferson County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 163 acres.
Is Blunn Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Blunn Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for oxygen depletion (low DO). Check local advisories before you swim.