Shawano County Lake Quality
Wisconsin, 27 lakes, average grade C (Fair)
Shawano County's 27 graded lakes fall in the moderate-density bracket for Wisconsin. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Mission Lake (A); the most-stressed is Eddy by Pony Creek Lake (F).
Quick Answers for Shawano County
Planning a trip? Check special fishing regulations for Mission Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (6)
Wisconsin DNR Fisheries Survey resources for lakes in Shawano County. browse all reports →
- 2025Koonz and Beaulieu lakes shocking survey, 2025Fisheries Survey · WI DNR · 2025 (PDF)
- 2023Shawano Lake comprehensive summary, 2023Comprehensive Survey · WI DNR · 2023 (PDF)
- 2022Kolpack Lake spring shocking survey, 2022Spring Shocking Survey · WI DNR · 2022 (PDF)
- 2022Pella Pond spring netting survey, 2022Netting Survey · WI DNR · 2022 (PDF)
- 2021Cloverleaf Chain shocking survey, 2021Fisheries Survey · WI DNR · 2021 (PDF)
- 2021White Clay Lake comprehensive fisheries survey, 2021Comprehensive Survey · WI DNR · 2021 (PDF)
All Lakes in Shawano County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Mission Lake | A | 17.5 ft | 44 ft | 17 µg/L |
| 2 | Round Lake | A | 11 ft | 39 ft | 14.8 µg/L |
| 3 | Koonz Lake | A | 10.8 ft | 40 ft | 12 µg/L |
| 4 | Korth Lake | A | 12 ft | 48 ft | 13.5 µg/L |
| 5 | Pine Lake | A | 10.5 ft | 35 ft | 13.6 µg/L |
| 6 | Malone Lake | A | 13.5 ft | 31 ft | 16 µg/L |
| 7 | Sams Lake | A | 11 ft | 13 ft | 18 µg/L |
| 8 | Bealeau Lake | A | 11.5 ft | 24 ft | 16 µg/L |
| 9 | Grass Lake | B | 8.5 ft | 52 ft | 15.7 µg/L |
| 10 | Big Lake | B | 8 ft | - | 15 µg/L |
| 11 | Lulu Lake | B | 7 ft | 13 ft | 16.4 µg/L |
| 12 | Pensaukee Lake | B | 10.5 ft | 49 ft | - |
| 13 | Bahr Lake | B | 6.8 ft | 44 ft | 20.2 µg/L |
| 14 | Unknown Lake | B | 5 ft | - | 14.8 µg/L |
| 15 | Beauleau Lake | C | 9.5 ft | 24 ft | - |
| 16 | Long Lake | C | 6 ft | 35 ft | 22.3 µg/L |
| 17 | Loon Lake | C | 5.5 ft | 22 ft | 21.5 µg/L |
| 18 | Shawano Lake | C | 5.8 ft | 39.5 ft | 29.6 µg/L |
| 19 | Upper Red Lake | C | 7.5 ft | 15 ft | 39.2 µg/L |
| 20 | White Lake | C | 5.3 ft | 11 ft | 32.8 µg/L |
| 21 | White Clay Lake | C | 5 ft | 46 ft | 31.6 µg/L |
| 22 | Schoenick Lake at | C | 5 ft | 34 ft | 45.3 µg/L |
| 23 | Wagner Lake | C | 4 ft | 15 ft | 52 µg/L |
| 24 | Tilleda Pond | D | - | 11 ft | 64.4 µg/L |
| 25 | Pella Lake | D | 2.5 ft | 13 ft | 63.7 µg/L |
| 26 | Eddy by Pony Creek Lake | F | 0.5 ft | 11 ft | 1370 µg/L |
| 27 | Tilleda Off Bridge Lake | F | 0.5 ft | 11 ft | 525 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.