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East Bass Lake

Florence County, WisconsinLimited DataOligotrophic

On the LakeGrade rubric, East Bass Lake pulls an A: clarity at 17.8 ft and phosphorus readings still being added put it in the top bracket for Wisconsin.

Trophically, East Bass Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. A maximum depth of 42 ft puts East Bass Lake in the middle of Wisconsin's depth distribution. The lake is compact at 51 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 39 graded lakes in Florence County, East Bass Lake ranks 5 — in the top quartile locally.

East Bass Lake has at least one documented invasive species (Banded 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. 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 2022-07-14. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 17.8 ft down. Trophic State Index: 36.

MetricValueGrade
Water Clarity (Secchi Depth)17.8 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)36Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth42 ft
Surface Area51 acres

Fish Species

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

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

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

East 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 Snail

Water Quality Trend: Improving

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.289 m/yr4
See year-by-year chart →

Location

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County Ranking

Ranked #5 of 39 lakes in Florence County

Nearby Lakes in Florence County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2022).

Fish Species (DNR-rated)

Panfish(Present)Largemouth Bass(Present)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2022-07-14

Monitoring stations: 1