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.
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | C |
| Phosphorus | 16.8 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.443 m/yr | 6 |
| Phosphorus | → Stable | -0.13 µg/L/yr | 5 |
Location
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.
- AConnors LakeSawyer County · mi · Higher grade (B → A)
- ABarber LakeSawyer County · mi · Higher grade (B → A)
Nearby Lakes in Sawyer County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
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