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LakeQuality

Mcville Dam Lake vs Tolna Dam Lake

Water quality, depth, fish species, and recreation comparison.

Mcville Dam Lake has a higher water quality grade (C, Fair) than Tolna Dam Lake (D, Poor). Both are in Nelson County, Wisconsin.

Both Mcville Dam Lake and Tolna Dam Lake sit in North Dakota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are close: Mcville Dam Lake (C) and Tolna Dam Lake (D) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

C

Mcville Dam Lake

Nelson County, Wisconsin

Moderate clarity, visible to about 6.9 ft.

D

Tolna Dam Lake

Nelson County, Wisconsin

Murky, only visible to about 4.9 ft.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricMcville Dam LakeTolna Dam Lake
Overall GradeC (Fair)D (Poor)
Water Clarity6.9 ft4.9 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area33.4 acres166.3 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Statemesotrophiceutrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Mcville Dam Lake wins on overall water quality with a Grade C versus Tolna Dam Lake's Grade D. Water clarity: 6.9 ft vs 4.9 ft. For fishing diversity, Mcville Dam Lake also leads with 0 species.