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F

Potato Lake

Rusk County, WisconsinLimited DataEutrophic

Potato Lake grades an F: water clarity, phosphorus, and chlorophyll-a all rate poorly, placing it among the most stressed lakes monitored in Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within the 12 graded lakes of Rusk County, Potato Lake sits at rank 12, near the bottom of the county list.

No invasive species are currently listed at Potato Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Potato Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-21. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 3 ft of visibility. Trophic State Index: 61.

MetricValueGrade
Water Clarity (Secchi Depth)3 ftF
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)61Eutrophic

High nutrients, frequent algae, reduced clarity

Recreation & Access

2
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #12 of 12 lakes in Rusk County

Cleaner Lakes Within 30 Miles

Potato Lake holds Grade F. 4 nearby lakes hold higher grades.

Nearby Lakes in Rusk County

DNR Reports & Resources

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

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Source: EPA ATTAINS assessment unit WI10009222 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2026-06-21

Monitoring stations: 2

Where to stay near Potato Lake

Compare lakeside cabins, hotels, and vacation rentals near Potato Lake in Rusk County, Wisconsin — live availability and prices for your trip.

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