Vermont City Lake
McDonough County, WisconsinLimited DataHypereutrophic
Vermont City Lake is a highly nutrient-loaded hypereutrophic lake in McDonough County, IL. Water quality is graded F based on 1 sampling years through 2021.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-10-21. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
No clarity data. Phosphorus level: 103 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 103 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #1 of 1 lakes in McDonough County
Nearby Lakes in McDonough County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Vermont City Lake is a man-made reservoir impounded by the Vermont City Reservoir Dam (completed 1940), built primarily for recreation on the TRIB SUGAR CREEK; earth-type dam, 36 ft tall and 500 ft long.
- Normal storage
- 331 ac-ft
- Max storage
- 704 ac-ft
- Hazard class
- Significant
- Owner
- VILLAGE OF VERMONT
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID IL00272 · Operator website
EPA Impairment Status
Vermont City 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_RDM · 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: 2021-10-21
Monitoring stations: 1