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LakeQuality

Olp-04 Lake vs Olp-09 Lake

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

Olp-04 Lake and Olp-09 Lake both received the same overall water quality grade of F (Very Poor). Both are in Dubois County, Wisconsin.

Both Olp-04 Lake and Olp-09 Lake sit in Indiana. 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. These two are within a letter of each other on the rubric — Olp-04 Lake (F) versus Olp-09 Lake (F). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

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.

F

Olp-04 Lake

Dubois County, Wisconsin

Very murky, less than 2.8 ft of visibility.

F

Olp-09 Lake

Dubois County, Wisconsin

Very murky, less than 1.7 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.

MetricOlp-04 LakeOlp-09 Lake
Overall GradeF (Very Poor)F (Very Poor)
Water Clarity2.8 ft1.7 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)48.1 µg/L75.6 µg/L
Maximum Depth--
Surface Area9.8 acres24 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophichypereutrophic

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

Verdict

Both lakes earn the same Grade F. The tiebreakers come down to clarity (Olp-04 Lake: 2.8 ft, Olp-09 Lake: 1.7 ft) and what you want from the lake. Olp-04 Lake matches its peer on species count.