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LakeQuality
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Bass Lake

Barron County, WisconsinOligotrophic

On the LakeGrade rubric, Bass Lake pulls an A: clarity at 32.8 ft and 17 µg/L of phosphorus put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 36 puts Bass 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. At 118 acres, Bass Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Among the 38 graded lakes in Barron County, Bass Lake ranks 2 — in the top quartile locally.

An invasive species record — Chinese Mystery Snail — has been logged at Bass Lake; Wisconsin DNR maintains the official infested-waters list. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. Public access is available — the lake is on the Wisconsin DNR public-access list. 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 2025-10-08. 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 32.8 ft down. Phosphorus level: 17 µg/L. Trophic State Index: 36.

MetricValueGrade
Water Clarity (Secchi Depth)32.8 ftA
Phosphorus17 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)36Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Surface Area118 acres
Public AccessYes

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

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

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

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

Invasive Species

Chinese Mystery Snail

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+1.365 m/yr7
Phosphorus Improving-0.54 µg/L/yr6

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #2 of 38 lakes in Barron County

Nearby Lakes in Barron County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1997. 1 station on file (most recent sample 2026).

DNR Assessment
Good · Shallow Seepage lake
Trophic State Index 45 (mesotrophic) · 5-year average

Fish Species (DNR-rated)

Largemouth Bass(Common)Northern Pike(Common)Panfish(Present)

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: 2025-10-08

Monitoring stations: 1