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LakeQuality
C

Silver Lake

Walworth County, WisconsinLimited DataMesotrophic

Silver Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Silver Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 85 acres, Silver Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within the 34 graded lakes of Walworth County, Silver Lake sits at rank 26, near the bottom of the county list.

Eurasian watermilfoil has been documented at Silver Lake, requiring shoreline management to keep dense mats from crowding native vegetation. 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. A documented public access point at Silver Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Moderate clarity, visible to about 9.8 ft. Trophic State Index: 44.

MetricValueGrade
Water Clarity (Secchi Depth)9.8 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)44Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Surface Area85 acres
Public AccessYes

Invasive Species

Curly-Leaf PondweedEurasian Water-Milfoil

Water Quality Trend: Declining

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-1.5 m/yr2

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #26 of 34 lakes in Walworth County

Nearby Lakes in Walworth County

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

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2023-08-15

Monitoring stations: 1