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LakeQuality
A

Bass Lake

Barron County, WisconsinLimited DataOligotrophic

Bass Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Barron County. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake bottoms out at 39 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 20 acres, Bass Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within Barron County's 38 graded waters, Bass Lake sits at rank 3, near the top of the local distribution.

No invasive species are currently listed at Bass Lake — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 3 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. 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 2019-10-19. 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 36.1 ft down. Trophic State Index: 25.

MetricValueGrade
Water Clarity (Secchi Depth)36.1 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)25Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth39 ft
Surface Area20 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)

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Stable-0.15 m/yr6
Phosphorus Declining+0.68 µg/L/yr5

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #3 of 38 lakes in Barron County

Nearby Lakes in Barron County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2019).

Fish Species (DNR-rated)

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

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: 2019-10-19

Monitoring stations: 1