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LakeQuality
F

Schultz Lake

Kandiyohi County, MinnesotaHypereutrophic

On the LakeGrade rubric Schultz Lake fails the cutoffs — a TSI of 75 and persistent algal pressure put it in the bottom tier. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI above 70 puts Schultz Lake in hypereutrophic territory: visible blooms are common, and clarity rarely climbs even in early summer. 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. Schultz Lake ranks 27 of 35 in Kandiyohi County — at the lower end of the locally monitored distribution.

Schultz Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Schultz Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. 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 2024-09-23. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.6 ft of visibility. Phosphorus level: 182.5 µg/L. Trophic State Index: 75.

MetricValueGrade
Water Clarity (Secchi Depth)1.6 ftF
Phosphorus182.5 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)75Hypereutrophic

Very high nutrients, dense algae, poor clarity

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.026 m/yr5
Phosphorus Improving-12.2 µg/L/yr5

Location

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County Ranking

Ranked #27 of 35 lakes in Kandiyohi County

Nearby Lakes in Kandiyohi County

Hypereutrophic Lakes in Minnesota

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Schultz Lake. 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: 2024-09-23

Monitoring stations: 1