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Pine Lake

Shawano County, WisconsinMesotrophic

Pine Lake earns an A — every scored parameter (clarity and phosphorus) rates among the best monitored waters in Shawano County. clarity and phosphorus rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at Pine Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of 35 ft puts Pine Lake in the middle of Wisconsin's depth distribution. Pine Lake covers 217 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 27 graded lakes in Shawano County, Pine Lake ranks 5 — in the top quartile locally.

Zebra mussels have been documented at Pine Lake, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The fishery includes walleye among the lake's 5 documented species — a notable draw for Wisconsin anglers. 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 2025-10-24. 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

Good clarity, visible to about 10.5 ft. Phosphorus level: 13.6 µg/L. Trophic State Index: 43.

MetricValueGrade
Water Clarity (Secchi Depth)10.5 ftB
Phosphorus13.6 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)43Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth35 ft
Surface Area217 acres

Fish Species

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

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

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

Pine 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 SnailCurly-Leaf PondweedEurasian Water-MilfoilHybrid Eurasian / Northern Water-MilfoilRusty CrayfishZebra MusselStarry Stonewort

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.393 m/yr6
Phosphorus Stable+0.16 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #5 of 27 lakes in Shawano County

Nearby Lakes in Shawano County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1987. 1 station on file (most recent sample 2025).

Fish Species (DNR-rated)

Panfish(Common)Largemouth Bass(Common)Northern Pike(Common)Musky(Present)Walleye(Present)

EPA Impairment Status

Pine Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Cause unknown

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit WI10000097 · Official waterbody report · Matched by proximity (1.47 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-10-24

Monitoring stations: 1