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C

Fuller Lake

Oneida County, WisconsinEutrophic

The LakeGrade rubric puts Fuller Lake at a C: clarity at 4.3 ft, 25 µg/L of phosphorus, and a TSI of 53 signal an intermediate trophic state. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Wisconsin norms.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. 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. Fuller Lake sits at rank 70 of 134 in Oneida County, in the lower half of the local distribution.

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 2026-05-15. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 4.3 ft. Phosphorus level: 24.8 µg/L. Trophic State Index: 53.

MetricValueGrade
Water Clarity (Secchi Depth)4.3 ftD
Phosphorus24.8 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)53Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Improving

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.014 m/yr6
Phosphorus Improving-1.09 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #70 of 134 lakes in Oneida County

Cleaner Lakes Within 30 Miles

Fuller Lake holds Grade C. 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: 2026-05-15

Monitoring stations: 2

Where to stay near Fuller Lake

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