Twin Lakes is a lake in St. Croix County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

Twin Lakes

St. Croix County, Wisconsin99 acresView map Directions

No nutrient or algae sampling on record from Wisconsin DNR for this lake.

Area

99 acres

Surface area

Shoreline

1.5 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)

See the measurements Directions Where to stay

Twin Lakes in St. Croix County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Surface area: 99 acres.

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Twin Lakes is a 99-acre lake in St. Croix County, Wisconsin.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Twin Lakes is listed impaired under Clean Water Act §303(d) (IR 5R) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Twin Lakes is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Twin Lakes

These are the measurements Wisconsin DNR publishes for Twin Lakes, 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 Twin Lakes

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

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Twin Lakes covering fish populations, stocking, water quality, and management. 1 report on file.

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

2025
Twin Lakes northern pike stocking assessment survey, 2025
Fisheries Survey · WI DNR · 2025 (PDF)

Lake Details

Surface area

99 acres

Shoreline

1.5 mi

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

Stays via Stay22

Stays near Twin Lakes

Compare lakeside cabins, hotels, and vacation rentals near Twin Lakes in St. Croix County, Wisconsin — 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 Twin Lakes

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Follow Twin Lakes’s readings

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Fishing Twin Lakes

→ Twin Lakes fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit WI10008901 · Official waterbody report

Nearby Lakes in St. Croix County

Three Lakes4.6 miView →Dry Dam Lake5.1 miView →Little Falls Lake6.6 miView →Bass Lake10 ft clear · Mesotrophic8.3 miView →Perch Lake8.3 miView →Brushy Mound Lake—View →

Frequently asked questions about Twin Lakes

Where is Twin Lakes?: Twin Lakes is a lake in St. Croix County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Twin Lakes?: Twin Lakes in St. Croix County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Surface area: 99 acres.
Is Twin Lakes safe to swim in?: Nutrient and algae readings are not a swimming clearance. Twin Lakes is listed impaired under Clean Water Act §303(d) (IR 5R) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.