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Krenz Lake

Scott County, MinnesotaLimited DataOligotrophic

Krenz Lake earns an A — every scored parameter (clarity) rates among the best monitored waters in Scott County.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. 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. Within Scott County's 17 graded waters, Krenz Lake sits at rank 1, near the top of the local distribution.

No invasive species are currently listed at Krenz Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Krenz Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Krenz Lake — most use is by shoreline residents and their guests. Ice-out has been recorded 5 times at Krenz Lake, with a median around Apr 6. 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 2024-06-30. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 16.2 ft down. Trophic State Index: 37.

MetricValueGrade
Water Clarity (Secchi Depth)16.2 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)37Oligotrophic

Low nutrients, clear water, excellent for swimming

Water Quality Trend: Declining

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-1.126 m/yr4
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (6 observations).

Typical Ice-Out
Apr 6
EarliestLatest
Ice-Out2015-03-22 (2015)2022-04-09 (2022)
Ice-In2014-11-14 (2014)2014-11-14 (2014)

Most recent ice-out: 2022-04-09

Location

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County Ranking

Ranked #1 of 17 lakes in Scott County

Nearby Lakes in Scott County

EPA Impairment Status

Krenz Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

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

Source: EPA ATTAINS assessment unit MN19-0031-00 · Official waterbody report · Matched by proximity (1.08 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

Ice data from Minnesota DNR Climate

Most recent sample: 2024-06-30

Monitoring stations: 1