Where is Merwin Lake?

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

How deep is Merwin Lake?

Merwin Lake has a maximum depth of 15.9 feet. The lake covers 49 acres.

Merwin Lake

Carlton County, Minnesota49 acresView map Directions

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

Max depth

15.9 ft

Bathymetric survey

Area

49 acres

Surface area

Shoreline

1.2 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
16 ft max depth

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Merwin Lake in Carlton County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 15.9 ft. Surface area: 49 acres.

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Merwin Lake is a 49-acre lake in Carlton County, Minnesota with a maximum depth of 16 feet.

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

Swimming conditions

No reading

Recreation use not supported

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

Whether Merwin 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 Merwin Lake

These are the measurements Minnesota PCA publishes for Merwin 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

15.9 ft

Surface area

49 acres

Shoreline

1.2 mi

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

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Stays near Merwin Lake

Compare lakeside cabins, hotels, and vacation rentals near Merwin Lake in Carlton 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 Merwin Lake

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

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Recreation.

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

Source: EPA ATTAINS assessment unit MN09-0058-00 · Official waterbody report

Nearby Lakes in Carlton County

Island Lake2.3 miView →Island Lake5.1 ft clear · Eutrophic3 miView →Little Kettle Lake2.9 miView →Kettle LakeEutrophic3.2 miView →Eagle Lake7 ft clear · Mesotrophic3.4 miView →Woodbury Lake4.8 miView →

Frequently asked questions about Merwin Lake

Where is Merwin Lake?: Merwin Lake is a lake in Carlton County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Merwin Lake?: Merwin Lake in Carlton County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 15.9 ft. Surface area: 49 acres.
Is Merwin Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Merwin Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Merwin Lake?: Merwin Lake has a maximum depth of 15.9 feet. The lake covers 49 acres.