Rock Lake Village Lake
Johnson County, WisconsinMesotrophic
Rock Lake Village Lake is a 27-acre mesotrophic lake in Johnson County, MO. Water quality is graded B based on 3 sampling years through 2024. Compared to the 4 other monitored lakes in Johnson County, Rock Lake Village Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-27. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Murky, only visible to about 4.3 ft. Phosphorus level: 16 µg/L. Chlorophyll-a: 4.8 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | D |
| Phosphorus | 16 µg/L | A |
| Chlorophyll-a (Algae) | 4.8 µg/L | A |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 27 acres |
Location
County Ranking
Ranked #1 of 5 lakes in Johnson County
Nearby Lakes in Johnson County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Rock Lake Village Lake is a man-made reservoir impounded by the Rock Lake Village Dam (completed 2006) on the Trib. Blackwater river; earth-type dam, 66 ft tall and 730 ft long.
- Surface area
- 27 ac
- Normal storage
- 540 ac-ft
- Max storage
- 585 ac-ft
- Drainage area
- 0.11 sq mi
- Hazard class
- High
Source: USACE National Inventory of Dams, NID ID MO40148 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-27
Monitoring stations: 1