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C

Little Trade Lake

Burnett County, WisconsinEutrophic

Little Trade Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.

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. Little Trade Lake reaches 19 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. The lake's 126 acres and partial shoreline records put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Little Trade Lake ranks 46 of 57 in Burnett County — at the lower end of the locally monitored distribution.

Little Trade Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The state fisheries records do not list documented species for Little Trade Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-07-27. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 3.5 ft. Phosphorus level: 50 µg/L. Trophic State Index: 60.

MetricValueGrade
Water Clarity (Secchi Depth)3.5 ftD
Phosphorus50 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)60Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth19 ft
Surface Area126 acres

Invasive & Introduced Species

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

Curly-Leaf PondweedEurasian Water-Milfoil

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.15 m/yr4
Phosphorus Declining+2.53 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #46 of 57 lakes in Burnett County

Cleaner Lakes Within 30 Miles

Little Trade Lake holds Grade C. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Burnett County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2000. 5 stations on file (most recent sample 2025).

DNR Assessment
Fair · Shallow Lowland lake
Trophic State Index 62 (eutrophic) · 5-year average

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Source: EPA ATTAINS assessment unit WI10005128 · 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

Most recent sample: 2025-07-27

Monitoring stations: 1