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LakeQuality

Koontz Lake vs Umk-01 Lake

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

Koontz Lake and Umk-01 Lake both received the same overall water quality grade of D (Poor). Both are in Wisconsin.

Both Koontz Lake and Umk-01 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 — Koontz Lake (D) versus Umk-01 Lake (D). 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.

D

Koontz Lake

Starke County, Wisconsin

Murky, only visible to about 4.9 ft.

D

Umk-01 Lake

St. Joseph County, Wisconsin

Very murky, less than 2.1 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.

MetricKoontz LakeUmk-01 Lake
Overall GradeD (Poor)D (Poor)
Water Clarity4.9 ft2.1 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)No data10.4 µg/L
Maximum Depth--
Surface Area324.43 acres345 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophiceutrophic

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

Verdict

Both lakes earn the same Grade D. The tiebreakers come down to clarity (Koontz Lake: 4.9 ft, Umk-01 Lake: 2.1 ft) and what you want from the lake. Koontz Lake matches its peer on species count.