Where is Murphy Lake?

Murphy Lake is a lake in Scott County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.

How deep is Murphy Lake?

Murphy Lake has a maximum depth of 20.6 feet. The lake covers 47 acres.

Murphy Lake

Scott County, Minnesota47 acresView map Directions

No nutrient or algae sampling on record from Minnesota PCA for this lake.

Max depth

20.6 ft

Bathymetric survey

Area

47 acres

Surface area

Shoreline

2.1 mi

Measured length

Impaired · Mercury
21 ft max depth

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Murphy Lake in Scott County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 20.6 ft. Surface area: 47 acres.

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Murphy Lake is a 47-acre lake in Scott County, Minnesota with a maximum depth of 21 feet.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Murphy Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Murphy Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Murphy Lake

These are the measurements Minnesota PCA publishes for Murphy Lake, 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

Max depth

20.6 ft

Surface area

47 acres

Shoreline

2.1 mi

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

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Stays near Murphy Lake

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Fishing Murphy Lake

→ Murphy Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Murphy Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN70-0010-00 · Official waterbody report

Nearby Lakes in Scott County

Hanrahan Lake1.1 miView →Krenz Lake16.2 ft clear1 miView →Mccoll Pond—View →Cate'S Lake5.6 ft clear · Mesotrophic2.7 miView →Cleary Lake2.3 ft clear · Hypereutrophic2.8 miView →Lower Prior Lake10 ft clear · Mesotrophic—View →

Frequently asked questions about Murphy Lake

Where is Murphy Lake?: Murphy Lake is a lake in Scott County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Murphy Lake?: Murphy Lake in Scott County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 20.6 ft. Surface area: 47 acres.
Is Murphy Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Murphy Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Murphy Lake?: Murphy Lake has a maximum depth of 20.6 feet. The lake covers 47 acres.