Where is Franklin Lake?

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

How deep is Franklin Lake?

Franklin Lake has a maximum depth of 18 feet. The lake covers 150 acres.

Franklin Lake

St. Louis County, Minnesota150 acresView map Directions

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

Max depth

18 ft

Bathymetric survey

Area

150 acres

Surface area

Shoreline

2.4 mi

Measured length

Impaired · Mercury
18 ft max depth

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Franklin Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 18 ft. Surface area: 150 acres.

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Franklin Lake is a 150-acre lake in St. Louis County, Minnesota with a maximum depth of 18 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. Franklin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Franklin 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 Franklin Lake

These are the measurements Minnesota PCA publishes for Franklin 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.

Ask about Franklin Lake

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

Lake Details

Max depth

18 ft

Surface area

150 acres

Shoreline

2.4 mi

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Stays near Franklin Lake

Compare lakeside cabins, hotels, and vacation rentals near Franklin Lake in St. Louis County, Minnesota — 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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Fishing Franklin Lake

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

EPA Impairment Status

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

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

Source: EPA ATTAINS assessment unit MN69-0754-00 · Official waterbody report

Nearby Lakes in St. Louis County

Johnson Lake3.3 miView →Marion Lake2.8 miView →Spring Lake5 miView →Moose Lake3.6 miView →Lucille Lake5.4 miView →Little Johnson Lake5.5 miView →

Frequently asked questions about Franklin Lake

Where is Franklin Lake?: Franklin Lake is a lake in St. Louis County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Franklin Lake?: Franklin Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 18 ft. Surface area: 150 acres.
Is Franklin Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Franklin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Franklin Lake?: Franklin Lake has a maximum depth of 18 feet. The lake covers 150 acres.