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LakeQuality
D

Beckman Lake

Green County, WisconsinLimited DataEutrophic

On the scoring rubric Beckman Lake grades a D: clarity at 6.6 ft and phosphorus readings still being added keep it in the lower bracket for Green County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. 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.

Beckman Lake has no invasive species recorded in Wisconsin state databases as of 2019, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Beckman Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2019-08-07. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 6.6 ft. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)6.6 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #1 of 1 lakes in Green County

Nearby Lakes in Green County

Eutrophic Lakes in Wisconsin

DNR Reports & Resources

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

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2019-08-07

Monitoring stations: 1