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LakeQuality
B

Whitefish Lake

Oneida County, WisconsinMesotrophic

On the LakeGrade scale Whitefish Lake grades a B, with clarity at 8.8 ft and 16 µg/L of phosphorus placing it above the Wisconsin median. Clarity is the limiting factor — phosphorus is reasonable but suspended particles or algal cells keep water transparency below Wisconsin norms.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake bottoms out at 33 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Whitefish Lake covers 199 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 134 graded lakes in Oneida County, Whitefish Lake sits at rank 38, above the county median.

Eurasian watermilfoil has been documented at Whitefish Lake, requiring shoreline management to keep dense mats from crowding native vegetation. Walleye are documented at Whitefish Lake, one of 6 fish species on record for the lake. A documented public access point at Whitefish Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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 2026-05-03. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 8.8 ft. Phosphorus level: 16 µg/L. Trophic State Index: 45.

MetricValueGrade
Water Clarity (Secchi Depth)8.8 ftC
Phosphorus16 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)45Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth33 ft
Surface Area199 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

→ Best fishing times for Whitefish Lake (14-day solunar calendar)

→ Is it safe to eat fish from Whitefish Lake? (mercury & PFAS guide)

Whitefish Lake fishing regulations (limits, seasons, special rules)

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Chinese Mystery SnailEurasian Water-MilfoilRusty Crayfish

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.286 m/yr6
Phosphorus Improving-1.21 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #38 of 134 lakes in Oneida County

Nearby Lakes in Oneida County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1993. 2 stations on file (most recent sample 2025).

DNR Assessment
Excellent · Deep Lowland lake
Trophic State Index 44 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Northern Pike(Common)Walleye(Common)Musky(Present)Panfish(Present)Largemouth Bass(Present)Smallmouth Bass(Present)

EPA Impairment Status

Whitefish Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Source: EPA ATTAINS assessment unit WI10007517 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2026-05-03

Monitoring stations: 1

Where to stay near Whitefish Lake

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