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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 32 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +2 µg/L/yr | 2 |
Location
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
More Minnesota Lake Rankings
State Parks Near Breda Lake
Other Grade C Lakes in Minnesota
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