Hazel Hill Lake by Dam 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 Hazel Hill Lake by Dam (D, Poor). Both are in Johnson County, Wisconsin.
Both Hazel Hill Lake by Dam 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. Rock Lake Village Lake (B) is materially cleaner than Hazel Hill Lake by Dam (D). 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 — Rock Lake Village 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?
Hazel Hill Lake by Dam
Very murky, less than 2 ft of visibility.
Rock Lake Village Lake
Murky, only visible to about 4.3 ft.
Side-by-Side Metrics
| Metric | Hazel Hill Lake by Dam | Rock Lake Village Lake |
|---|---|---|
| Overall Grade | D (Poor) | B (Good) |
| Water Clarity | 2 ft | 4.3 ft |
| Phosphorus | 59.3 µg/L | 16 µg/L |
| Chlorophyll-a (Algae) | 28 µg/L | 4.8 µg/L |
| Maximum Depth | - | - |
| Surface Area | 71 acres | 27 acres |
| Public Access | Unknown | Unknown |
| Fish Species | 0 | 0 |
| Trophic State | eutrophic | mesotrophic |
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 Hazel Hill Lake by Dam's Grade D. Water clarity: 4.3 ft vs 2 ft. For fishing diversity, Rock Lake Village Lake also leads with 0 species.