West Lake Osceola
Clarke County, WisconsinEutrophic
West Lake Osceola is a 306-acre productive, nutrient-rich eutrophic lake in Clarke County, IA. Water quality is graded D based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Clarke County, West Lake Osceola ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-30. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2.2 ft of visibility. Chlorophyll-a: 28.7 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.2 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 28.7 µg/L | D |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 306 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Clarke County
Nearby Lakes in Clarke County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
West Lake Osceola is a man-made reservoir impounded by the West Lake Dam (completed 1935), built primarily for water supply on the TR-SOUTH SQUAW CREEK; earth-type dam, 58 ft tall and 1,275 ft long.
- Surface area
- 306 ac
- Normal storage
- 4,195 ac-ft
- Max storage
- 9,675 ac-ft
- Drainage area
- 9.84 sq mi
- Hazard class
- Significant
- Owner
- City of Osceola Water Utilities Board
Source: USACE National Inventory of Dams, NID ID IA00213 · Operator website · Matched by proximity (0.1 km)
EPA Impairment Status
West Lake Osceola is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit IA 04-LDM-1082 · Official waterbody report
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: 2024-09-30
Monitoring stations: 1