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LakeQuality
A

Star Lake

Oconto County, WisconsinOligotrophic

On the LakeGrade rubric, Star Lake pulls an A: clarity at 49.2 ft and 14 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.

Trophically, Star Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 57 acres, Star Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Star Lake ranks 24 of 66 in Oconto County — solidly in the upper half of the local distribution.

Star 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. The fishery is bass-led, with 2 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 2020-09-14. 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 49.2 ft down. Phosphorus level: 14.2 µg/L. Trophic State Index: 32.

MetricValueGrade
Water Clarity (Secchi Depth)49.2 ftA
Phosphorus14.2 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)32Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Surface Area57 acres
Public AccessYes

Fish Species

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

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

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

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

Invasive Species

Banded Mystery Snail

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-2.5 m/yr4
Phosphorus Declining+1.9 µg/L/yr2
See year-by-year chart →

Recreation & Access

2
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #24 of 66 lakes in Oconto County

Nearby Lakes in Oconto County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2020).

Fish Species (DNR-rated)

Panfish(Common)Largemouth Bass(Present)

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Star Lake covering fish populations, stocking, water quality, and management. 1 report on file.

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: 2020-09-14

Monitoring stations: 1