Clark County Lake Quality
Wisconsin, 4 lakes, average grade D (Poor)
Only 4 lakes in Clark County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. On average, Clark County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
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 Unnamed Lake (D); the most-stressed is Mead Lake (D).
Quick Answers for Clark County
Planning a trip? Check special fishing regulations for Unnamed Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
DNR Reports (4)
Wisconsin DNR Fisheries Survey resources for lakes in Clark County. browse all reports →
- 2024Black River gamefish survey, 2024Fisheries Survey · WI DNR · 2024 (PDF)
- 2023Emerson Lake fisheries survey, 2023Fisheries Survey · WI DNR · 2023 (PDF)
- 2022Sportsmans Lake spring netting survey, 2022Netting Survey · WI DNR · 2022 (PDF)
- 2009Clark Lake Fishery Survey Report 2009Fisheries Survey · WI DNR · 2009 (PDF)
All Lakes in Clark County
| Rank | Lake | Grade | Clarity | Max Depth | Phosphorus |
|---|---|---|---|---|---|
| 1 | Unnamed Lake | D | 4.3 ft | - | - |
| 2 | Mead Lake Nb Test Site | D | 6.6 ft | 16 ft | - |
| 3 | Mead Lake Nb Control Site | D | 6.6 ft | 16 ft | - |
| 4 | Mead Lake | D | 6.6 ft | 16 ft | 204.5 µg/L |
Source: EPA National Aquatic Resource Surveys, 2026.