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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.2 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.126 m/yr | 4 |
Ice Season
Historical ice data from Minnesota DNR (6 observations).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2015-03-22 (2015) | 2022-04-09 (2022) |
| Ice-In | 2014-11-14 (2014) | 2014-11-14 (2014) |
Most recent ice-out: 2022-04-09
Location
County Ranking
Ranked #1 of 17 lakes in Scott County
Nearby Lakes in Scott County
More Minnesota Lake Rankings
State Parks Near Krenz Lake
Other Grade A Lakes in Minnesota
Oligotrophic Lakes in Minnesota
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
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