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F

Kauppi Lake

St. Louis County, MinnesotaLimited DataEutrophic

Kauppi Lake grades an F: every scored parameter (clarity) rates poorly, placing it among the most stressed lakes monitored in Minnesota.

At a TSI of 61, Kauppi Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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 187 graded lakes of St. Louis County, Kauppi Lake sits at rank 187, near the bottom of the county list.

No invasive species are currently listed at Kauppi Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Kauppi Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Kauppi Lake — most use is by shoreline residents and their guests. 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, Minnesota DNR LakeFinder, last sampled 2024-10-18. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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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

Location

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County Ranking

Ranked #187 of 187 lakes in St. Louis County

Cleaner Lakes Within 30 Miles

Kauppi Lake holds Grade F. 5 nearby lakes hold higher grades.

Nearby Lakes in St. Louis County

Eutrophic Lakes in Minnesota

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-10-18

Monitoring stations: 1