Lamb Lake
Johnson County, WisconsinLimited DataMesotrophic
Lamb Lake is a 56-acre mesotrophic lake in Johnson County, IN. Water quality is graded C based on 1 sampling years through 2023. Compared to the 1 other monitored lakes in Johnson County, Lamb Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-07-11. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.2 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.2 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 56.3 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Johnson County
Cleaner Lakes Within 30 Miles
Lamb Lake holds Grade C. 3 nearby lakes hold higher grades.
- BWwu180 LakeMonroe County · 13.1 mi · Higher grade (C → B)
- BWwu-17 LakeMonroe County · 15.9 mi · Higher grade (C → B)
- BWel-06 LakeBrown County · 14.7 mi · Higher grade (C → B)
Nearby Lakes in Johnson County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lamb Lake is a man-made reservoir impounded by the Lamb Lake Dam (completed 1937), built primarily for recreation on the UNNAMED TRIBUTARY BEAR CREEK; earth-type dam, 45 ft tall and 860 ft long.
- Surface area
- 56.3 ac
- Normal storage
- 1,600 ac-ft
- Max storage
- 1,600 ac-ft
- Drainage area
- 3.1 sq mi
- Hazard class
- High
- Owner
- THOMAS JOHNSON
Source: USACE National Inventory of Dams, NID ID IN00338 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-07-11
Monitoring stations: 1