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Lk Superior 3.3 Mi E of Superior Lake

Douglas County, WisconsinLimited DataOligotrophic

On the LakeGrade rubric, Lk Superior 3.3 Mi E of Superior Lake pulls an A: clarity readings still being added and 9 µg/L of phosphorus put it in the top bracket for 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, Lk Superior 3.3 Mi E of Superior 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. Lk Superior 3.3 Mi E of Superior Lake ranks 11 of 40 in Douglas County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Lk Superior 3.3 Mi E of Superior Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Lk Superior 3.3 Mi E of Superior Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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, Wisconsin DNR Surface Water, last sampled 2022-08-26. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

No clarity data. Phosphorus level: 9 µg/L. Trophic State Index: 36.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus9 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)36Oligotrophic

Low nutrients, clear water, excellent for swimming

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-11.8 m/yr2
Phosphorus Declining+6.3 µg/L/yr2

Location

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County Ranking

Ranked #11 of 40 lakes in Douglas County

Nearby Lakes in Douglas 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: 2022-08-26

Monitoring stations: 1