Silver Lake
Walworth County, WisconsinLimited DataEutrophic
Silver Lake grades an F: every scored parameter (clarity) rates poorly, placing it among the most stressed lakes monitored in Wisconsin.
At a TSI of 61, Silver Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Silver Lake is a shallow lake at 3 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. The lake is compact at 85 acres, with partial shoreline records and little volume to buffer nutrient inputs. Silver Lake ranks 30 of 34 in Walworth County — at the lower end of the locally monitored distribution.
Silver Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The state fisheries records do not list documented species for Silver Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-08-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 3 ft of visibility. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 3 ft |
| Surface Area | 85 acres |
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -1.5 m/yr | 2 |
Location
County Ranking
Ranked #30 of 34 lakes in Walworth County
Cleaner Lakes Within 30 Miles
Silver Lake holds Grade F. 5 nearby lakes hold higher grades.
- AMiddle LakeWalworth County · mi · Two grade letters higher (F → A)
- AGreen LakeWalworth County · mi · Two grade letters higher (F → A)
- APleasant LakeWalworth County · mi · Two grade letters higher (F → A)
- ATurtle LakeWalworth County · mi · Two grade letters higher (F → A)
- BMill LakeWalworth County · mi · Two grade letters higher (F → B)
Nearby Lakes in Walworth County
More Wisconsin Lake Rankings
State Parks Near Silver Lake
Other Grade F Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2023).
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-08-15
Monitoring stations: 1