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LakeQuality
B

Fuller Lake

Oneida County, WisconsinMesotrophic

On the LakeGrade scale Fuller Lake grades a B, with clarity at 13.9 ft and 25 µg/L of phosphorus placing it above the Wisconsin median. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. 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 the 140 graded lakes of Oneida County, Fuller Lake sits at rank 113, near the bottom of the county list.

No invasive species are currently listed at Fuller Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Fuller 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 2025-08-31. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 13.9 ft. Phosphorus level: 24.8 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)13.9 ftB
Phosphorus24.8 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Stable-0.071 m/yr7
Phosphorus Improving-1.09 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #113 of 140 lakes in Oneida County

Cleaner Lakes Within 30 Miles

Fuller Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Oneida County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-08-31

Monitoring stations: 2