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LakeQuality

Knob Noster S.P. Lake 2 vs Rock Lake Village Lake

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

Rock Lake Village Lake has a higher water quality grade (B, Good) than Knob Noster S.P. Lake 2 (C, Fair). Both are in Johnson County, Wisconsin.

Both Knob Noster S.P. Lake 2 and Rock Lake Village Lake sit in Missouri. 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: Knob Noster S.P. Lake 2 (C) and Rock Lake Village Lake (B) 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

Knob Noster S.P. Lake 2

Johnson County, Wisconsin

Murky, only visible to about 3.9 ft.

B

Rock Lake Village Lake

Johnson County, Wisconsin

Murky, only visible to about 4.3 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.

MetricKnob Noster S.P. Lake 2Rock Lake Village Lake
Overall GradeC (Fair)B (Good)
Water Clarity3.9 ft4.3 ft
Phosphorus29 µg/L16 µg/L
Chlorophyll-a (Algae)10.6 µg/L4.8 µg/L
Maximum Depth--
Surface Area16 acres27 acres
Public AccessUnknownUnknown
Fish Species00
Trophic Stateeutrophicmesotrophic

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

Verdict

Rock Lake Village Lake wins on overall water quality with a Grade B versus Knob Noster S.P. Lake 2's Grade C. Water clarity: 4.3 ft vs 3.9 ft. For fishing diversity, Rock Lake Village Lake also leads with 0 species.