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LakeQuality
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Mi17 Lake

Racine County, WisconsinOligotrophic

Mi17 Lake sits at the top of the Wisconsin DNR grading rubric with an A, a mark reached by the cleanest lakes in Wisconsin. 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.

Trophically, Mi17 Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. 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. Among the 7 graded lakes in Racine County, Mi17 Lake sits at rank 2, above the county median.

Mi17 Lake has no invasive species recorded in Wisconsin state databases as of 2023, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Mi17 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 2023-08-01. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 39.7 ft down. Chlorophyll-a: 0.8 µg/L. Trophic State Index: 26.

MetricValueGrade
Water Clarity (Secchi Depth)39.7 ftA
PhosphorusNo data
Chlorophyll-a (Algae)0.8 µg/LA
Trophic State Index (TSI)26Oligotrophic

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-1.074 m/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #2 of 7 lakes in Racine County

Nearby Lakes in Racine County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2023-08-01

Monitoring stations: 1