Lambach Lake
Scott County, WisconsinMesotrophic
Lambach Lake is a 9-acre mesotrophic lake in Scott County, IA. Water quality is graded B based on 2 sampling years through 2024. Compared to the 4 other monitored lakes in Scott County, Lambach Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-10. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7.9 ft. Chlorophyll-a: 5.1 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.9 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 5.1 µg/L | B |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 9 acres |
Location
County Ranking
Ranked #1 of 5 lakes in Scott County
Nearby Lakes in Scott County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lambach Lake is a man-made reservoir impounded by the Northeast Lake Dam (completed 1972), built primarily for recreation on the BLACKHAWK CREEK; earth-type dam, 26 ft tall and 400 ft long.
- Surface area
- 9 ac
- Normal storage
- 75 ac-ft
- Max storage
- 160 ac-ft
- Drainage area
- 0.2 sq mi
- Hazard class
- Low
- Owner
- Scott County Conservation Board
All listed purposes: Recreation;Other.
Source: USACE National Inventory of Dams, NID ID IA00981 · Operator website · Matched by proximity (0.08 km)
EPA Impairment Status
Lambach Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 01-NEM-68 · Official waterbody report · Matched by proximity (0.6 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-10
Monitoring stations: 1