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LakeQuality

Bernice Lake vs Long Lake

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

Long Lake has a higher water quality grade (B, Good) than Bernice Lake (D, Poor). Both are in Fond du Lac County, Wisconsin.

Bernice Lake and Long Lake are both in Wisconsin — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The grades are meaningfully apart: Long Lake grades a B while Bernice Lake grades a D. That two-letter spread reflects real underlying differences — different watershed inputs, different depth profiles, or different monitoring rigor.

For a recreational visitor, the wider grade gap is decisive — Long 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?

D

Bernice Lake

Fond du Lac County, Wisconsin

Murky, only visible to about 6.5 ft.

B

Long Lake

Fond du Lac County, Wisconsin

Moderate clarity, visible to about 9.1 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.

MetricBernice LakeLong Lake
Overall GradeD (Poor)B (Good)
Water Clarity6.5 ft9.1 ft
Phosphorus74.9 µg/L19.3 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area35 acres427 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophicmesotrophic

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

Verdict

Long Lake wins on overall water quality with a Grade B versus Bernice Lake's Grade D. Water clarity: 9.1 ft vs 6.5 ft. For fishing diversity, Long Lake also leads with 0 species.