Clark County Lake Quality
Wisconsin, 4 lakes, average grade D (Nutrient-rich)
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 Mead Lake (D); the most-stressed is Mead Lake (D).
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Quick Answers for Clark County
Planning a trip? Check special fishing regulations for Mead Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
Fishing in Clark County
DNR Reports (4)
Wisconsin DNR Fisheries Survey resources for lakes in Clark County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 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
4 lakes · 1 graded, 3 not rated1 graded lake · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | DMead LakeClark | D | 2 ft | 207 µg/L | No recent samples | No recent samples | 16 ft | ✓ Public |
| NRUnnamed LakeClark | NR | 1.3 ft | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRMead Lake Nb Test SiteClark | NR | 2 ft | No recent samples | No recent samples | No recent samples | 16 ft | ✓ Public | |
| NRMead Lake Nb Control SiteClark | NR | 2 ft | No recent samples | No recent samples | No recent samples | 16 ft | ✓ Public |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Wisconsin
See how Clark County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.