Skip to main content
LakeQuality
A

Little Bass Lake

Vilas County, WisconsinLimited DataOligotrophic

Little Bass Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Vilas 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.

A TSI value of 27 puts Little Bass Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. A maximum depth of 35 ft puts Little Bass Lake in the middle of Wisconsin's depth distribution. At 26 acres, Little Bass Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Little Bass Lake ranks 74 of 202 in Vilas County — solidly in the upper half of the local distribution.

Little Bass Lake has at least one documented invasive species (Chinese Mystery Snail), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. Bass fishing is part of the appeal: the species list runs to 2, anchored by largemouth and/or smallmouth bass. 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 2019-09-19. 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 32.8 ft down. Trophic State Index: 27.

MetricValueGrade
Water Clarity (Secchi Depth)32.8 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)27Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth35 ft
Surface Area26 acres

Fish Species

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

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

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

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

Invasive Species

Chinese Mystery Snail

Water Quality Trend: Stable

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

MetricTrendChange/YearYears
Water Clarity Declining-0.818 m/yr7
Phosphorus Improving-9.68 µg/L/yr4
See year-by-year chart →

Location

Loading map…

County Ranking

Ranked #74 of 202 lakes in Vilas County

Nearby Lakes in Vilas 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)

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: 2019-09-19

Monitoring stations: 1