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LakeQuality
B

Dunes Lake Just Us of Outlet

Door County, WisconsinLimited DataEutrophic

Dunes Lake Just Us of Outlet carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

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. Within Door County's 11 graded lakes, Dunes Lake Just Us of Outlet ranks 8 — below the local median, though not at the bottom.

No invasive species are currently listed at Dunes Lake Just Us of Outlet — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Dunes Lake Just Us of Outlet, 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 2021-05-18. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

No clarity data. Phosphorus level: 24.1 µg/L. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus24.1 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Improving

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.5 m/yr2
Phosphorus Improving-21.9 µg/L/yr2
See year-by-year chart →

Location

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County Ranking

Ranked #8 of 11 lakes in Door County

Cleaner Lakes Within 30 Miles

Dunes Lake Just Us of Outlet holds Grade B. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Door County

Eutrophic Lakes in Wisconsin

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: 2021-05-18

Monitoring stations: 1