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

How deep is Hardy Lake?

Hardy Lake has a maximum depth of 26.2 feet. The lake covers 86 acres.

Hardy Lake

Cass County, Minnesota86 acresView map Directions

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

Max depth

26.2 ft

Bathymetric survey

Area

86 acres

Surface area

Shoreline

1.9 mi

Measured length

Impaired · Mercury
26 ft max depth

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Hardy Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 26.2 ft. Surface area: 86 acres.

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Hardy Lake is a 86-acre lake in Cass County, Minnesota with a maximum depth of 26 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. Hardy Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Hardy 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 Hardy Lake

These are the measurements Minnesota PCA publishes for Hardy 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 Hardy Lake

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

Lake Details

Max depth

26.2 ft

Surface area

86 acres

Shoreline

1.9 mi

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Stays near Hardy Lake

Compare lakeside cabins, hotels, and vacation rentals near Hardy Lake in Cass 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 Hardy Lake

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

EPA Impairment Status

Hardy 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 MN11-0209-00 · Official waterbody report

Nearby Lakes in Cass County

Mile Lake3.2 miView →Bass Lake—View →Stephens Lake—View →Little Red Sand Lake—View →Dade Lake5.2 ft clear · Mesotrophic—View →Sylvan Lake19.5 ft clear · Oligotrophic—View →

Frequently asked questions about Hardy Lake

Where is Hardy Lake?: Hardy Lake is a lake in Cass County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Hardy Lake?: Hardy Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 26.2 ft. Surface area: 86 acres.
Is Hardy Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Hardy Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Hardy Lake?: Hardy Lake has a maximum depth of 26.2 feet. The lake covers 86 acres.