Oldham Lake
Monona County, WisconsinEutrophic
Oldham Lake is a 16-acre productive, nutrient-rich eutrophic lake in Monona County, IA. Water quality is graded C based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Monona County, Oldham Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-03. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 5.1 ft. Chlorophyll-a: 8.5 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.1 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 8.5 µg/L | B |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 16.1 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Monona County
Nearby Lakes in Monona County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Oldham Lake is a man-made reservoir impounded by the Davis-Battle Cr. Watershed Site D-3 (completed 1963), built primarily for fire protection, stock, or small fish pond on the TR-SOLDIER RIVER; earth-type dam, 46 ft tall and 600 ft long.
- Surface area
- 16.1 ac
- Normal storage
- 194 ac-ft
- Max storage
- 285 ac-ft
- Drainage area
- 1.06 sq mi
- Hazard class
- Low
- Owner
- Monona County SWCD
All listed purposes: Fire Protection, Stock, Or Small Fish Pond;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID IA00771 · Operator website · Matched by proximity (0.08 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-03
Monitoring stations: 1