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B

Lake of the Pines

Sawyer County, WisconsinMesotrophic

On the LakeGrade scale Lake of the Pines grades a B, with clarity at 8.0 ft and 17 µg/L of phosphorus placing it above the Wisconsin median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within Sawyer County's 50 graded lakes, Lake of the Pines ranks 28 — below the local median, though not at the bottom.

No invasive species are currently listed at Lake of the Pines — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Lake of the Pines, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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 2025-08-10. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 8 ft. Phosphorus level: 16.8 µg/L. Trophic State Index: 46.

MetricValueGrade
Water Clarity (Secchi Depth)8 ftC
Phosphorus16.8 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.443 m/yr6
Phosphorus Stable-0.13 µg/L/yr5
See year-by-year chart →

Location

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County Ranking

Ranked #28 of 50 lakes in Sawyer County

Cleaner Lakes Within 30 Miles

Lake of the Pines holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Sawyer County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-08-10

Monitoring stations: 2