Kinmundy New Lake
Marion County, WisconsinEutrophic
Kinmundy New Lake is a 100-acre productive, nutrient-rich eutrophic lake in Marion County, IL. Water quality is graded D based on 2 sampling years through 2022. Compared to the 5 other monitored lakes in Marion County, Kinmundy New Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-10-12. 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 2.9 ft of visibility. Phosphorus level: 36.5 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.9 ft | F |
| Phosphorus | 36.5 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 100 acres |
Location
County Ranking
Ranked #1 of 6 lakes in Marion County
Nearby Lakes in Marion County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Kinmundy New Lake is a man-made reservoir impounded by the Kinmundy New Lake Dam (completed 1998), built primarily for recreation on the TRIB EAST FORK KASKASKIA RIVER; earth-type dam, 38 ft tall and 1,250 ft long.
- Surface area
- 100 ac
- Normal storage
- 1,192 ac-ft
- Max storage
- 2,250 ac-ft
- Drainage area
- 1.91 sq mi
- Hazard class
- High
- Owner
- CITY OF KINMUNDY
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID IL50271 · Operator website
EPA Impairment Status
Kinmundy New 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 IL_SOF · 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: 2022-10-12
Monitoring stations: 3