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LakeQuality

Fordville Dam Lake vs Niagara Dam Lake

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

Fordville Dam Lake has a higher water quality grade (C, Fair) than Niagara Dam Lake (F, Very Poor). Both are in Grand Forks County, Wisconsin.

Both Fordville Dam Lake and Niagara 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. Fordville Dam Lake (C) is materially cleaner than Niagara Dam Lake (F). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.

For a recreational visitor, the wider grade gap is decisive — Fordville Dam Lake is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

C

Fordville Dam Lake

Grand Forks County, Wisconsin

Murky, only visible to about 4.4 ft.

F

Niagara Dam Lake

Grand Forks County, Wisconsin

Very murky, less than 1 ft of visibility.

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.

MetricFordville Dam LakeNiagara Dam Lake
Overall GradeC (Fair)F (Very Poor)
Water Clarity4.4 ft1 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)5.2 µg/LNo data
Maximum Depth--
Surface Area197.1 acres16 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophichypereutrophic

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

Verdict

Fordville Dam Lake wins on overall water quality with a Grade C versus Niagara Dam Lake's Grade F. Water clarity: 4.4 ft vs 1 ft. For fishing diversity, Fordville Dam Lake also leads with 0 species.