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LakeQuality
A

Unnamed Lake

Oneida County, WisconsinLimited DataOligotrophic

On the LakeGrade rubric, Unnamed Lake pulls an A: clarity at 35.7 ft and phosphorus readings still being added 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.

A TSI value of 26 puts Unnamed Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake is compact at 2 acres, with partial shoreline records and little volume to buffer nutrient inputs. Unnamed Lake ranks 67 of 140 in Oneida County — solidly in the upper half of the local distribution.

Unnamed Lake has no invasive species recorded in Wisconsin state databases as of 2022, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Unnamed 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 2022-08-09. 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 35.7 ft down. Trophic State Index: 26.

MetricValueGrade
Water Clarity (Secchi Depth)35.7 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)26Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Surface Area2 acres

Water Quality Trend: Declining

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.455 m/yr7
Phosphorus Stable+0.07 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #67 of 140 lakes in Oneida County

Nearby Lakes in Oneida County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2022).

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: 2022-08-09

Monitoring stations: 1