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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.6 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #1 of 1 lakes in Green County
Nearby Lakes in Green County
More Wisconsin Lake Rankings
State Parks Near Beckman Lake
Other Grade D Lakes in Wisconsin
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.
- 2021Beckman Lake Fishery Summary, 2021Fisheries Survey · WI DNR · 2021 (PDF)
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