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D

Wassermann West Lake

Carver County, MinnesotaEutrophic

Wassermann West Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. 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. Wassermann West Lake sits at rank 21 of 40 in Carver County, in the lower half of the local distribution.

Eurasian watermilfoil has been documented at Wassermann West Lake, requiring shoreline management to keep dense mats from crowding native vegetation. The state fisheries records do not list documented species for Wassermann West Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Public access is available — the lake is on the Minnesota PCA public-access list. 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, Minnesota DNR LakeFinder, last sampled 2021-09-29. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 5.2 ft. Phosphorus level: 63 µg/L. Trophic State Index: 59.

MetricValueGrade
Water Clarity (Secchi Depth)5.2 ftD
Phosphorus63 µg/LD
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)59Eutrophic

High nutrients, frequent algae, reduced clarity

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.03 m/yr5
Phosphorus Improving-4.8 µg/L/yr5
See year-by-year chart →

Location

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County Ranking

Ranked #21 of 40 lakes in Carver County

Cleaner Lakes Within 30 Miles

Wassermann West Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Carver County

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Wassermann West Lake. 1 report on file.

EPA Impairment Status

Wassermann West Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Impaired biota (cause unknown)MercuryNutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN10-0048-00 · Official waterbody report · Matched by proximity (0.59 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-09-29

Monitoring stations: 1