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LakeQuality
B

Bass Lake

Washburn County, WisconsinLimited DataOligotrophic

Bass Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI value of 39 puts Bass Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake bottoms out at 35 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. At 187 acres, Bass Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Bass Lake ranks 23 of 47 in Washburn County — solidly in the upper half of the local distribution.

An invasive species record — Banded Mystery Snail — has been logged at Bass Lake; Wisconsin DNR maintains the official infested-waters list. Walleye are documented at Bass Lake, one of 4 fish species on record for the lake. A documented public access point at Bass 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 2020-08-18. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 14 ft. Trophic State Index: 39.

MetricValueGrade
Water Clarity (Secchi Depth)14 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)39Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth35 ft
Surface Area187 acres
Public AccessYes

Fish Species

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

→ 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 & Introduced Species

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

Banded Mystery SnailChinese Mystery Snail

Water Quality Trend: Declining

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-5.36 m/yr2

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #23 of 47 lakes in Washburn County

Cleaner Lakes Within 30 Miles

Bass Lake holds Grade B. 3 nearby lakes hold higher grades.

Nearby Lakes in Washburn County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2021).

Fish Species (DNR-rated)

Walleye(Abundant)Musky(Common)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

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

Most recent sample: 2020-08-18

Monitoring stations: 1

Where to stay near Bass Lake

Compare lakeside cabins, hotels, and vacation rentals near Bass Lake in Washburn County, Wisconsin — live availability and prices for your trip.

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