Iowa Lkt Lake
Iowa County, WisconsinLimited DataEutrophic
Iowa Lkt Lake is a 92-acre productive, nutrient-rich eutrophic lake in Iowa County, IA. Water quality is graded D based on 1 sampling years through 2023. Compared to the 6 other monitored lakes in Iowa County, Iowa Lkt Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-10-04. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 3.7 ft. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.7 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 92 acres |
Location
County Ranking
Ranked #2 of 7 lakes in Iowa County
Cleaner Lakes Within 30 Miles
Iowa Lkt Lake holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Iowa County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Iowa Lkt Lake is a man-made reservoir impounded by the Lake Iowa Dam (completed 1962), built primarily for recreation on the PIG CREEK; earth-type dam, 40 ft tall and 893 ft long.
- Surface area
- 92 ac
- Normal storage
- 1,110 ac-ft
- Max storage
- 1,950 ac-ft
- Drainage area
- 2.17 sq mi
- Hazard class
- Significant
- Owner
- Iowa County Conservation Board
Source: USACE National Inventory of Dams, NID ID IA00520 · Operator website · Matched by proximity (0.23 km)
EPA Impairment Status
Iowa Lkt Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-IOW-677 · Official waterbody report · Matched by proximity (0.57 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: 2023-10-04
Monitoring stations: 1