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LakeQuality
D

06-0422-00 Lake

Big Stone County, MinnesotaEutrophic

On the scoring rubric 06-0422-00 Lake grades a D: clarity at 2.6 ft and 43 µg/L of phosphorus keep it in the lower bracket for Big Stone County. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

At a TSI of 61, 06-0422-00 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. 06-0422-00 Lake ranks 3 of 9 in Big Stone County — solidly in the upper half of the local distribution.

No invasive species are currently listed at 06-0422-00 Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for 06-0422-00 Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at 06-0422-00 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 2022-09-20. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 2.6 ft of visibility. Phosphorus level: 43 µg/L. Trophic State Index: 61.

MetricValueGrade
Water Clarity (Secchi Depth)2.6 ftF
Phosphorus43 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)61Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #3 of 9 lakes in Big Stone County

Nearby Lakes in Big Stone County

State Parks Near 06-0422-00 Lake

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2022-09-20

Monitoring stations: 1