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C

Breda Lake

St. Louis County, MinnesotaLimited DataEutrophic

The LakeGrade rubric puts Breda Lake at a C: clarity readings still being added, 32 µg/L of phosphorus, and a TSI of 54 signal an intermediate trophic state.

At a TSI of 54, Breda 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. Breda Lake sits at rank 133 of 187 in St. Louis County, in the lower half of the local distribution.

No invasive species are currently listed at Breda Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Breda 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, Minnesota DNR LakeFinder, last sampled 2024-07-16. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

No clarity data. Phosphorus level: 32 µg/L. Trophic State Index: 54.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus32 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)54Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Declining

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Phosphorus Declining+2 µg/L/yr2

Location

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County Ranking

Ranked #133 of 187 lakes in St. Louis County

Cleaner Lakes Within 30 Miles

Breda Lake holds Grade C. 4 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: 2024-07-16

Monitoring stations: 1