Lake Springfield
Sangamon County, WisconsinLimited DataHypereutrophic
Lake Springfield is a 4,224-acre highly nutrient-loaded hypereutrophic lake in Sangamon County, IL. Water quality is graded F based on 1 sampling years through 2024.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-21. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.5 ft of visibility. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 4.2K acres |
Location
County Ranking
Ranked #1 of 1 lakes in Sangamon County
Cleaner Lakes Within 30 Miles
Lake Springfield holds Grade F. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Sangamon County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Springfield is a man-made reservoir impounded by the Spaulding Dam (completed 1933), built primarily for recreation on the SUGAR CREEK; concrete-type dam, 48 ft tall and 3,300 ft long.
- Surface area
- 4,224 ac
- Normal storage
- 53,504 ac-ft
- Max storage
- 101,205 ac-ft
- Drainage area
- 265 sq mi
- Hazard class
- High
- Owner
- CITY WATER, LIGHT & POWER
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID IL00749 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-21
Monitoring stations: 1