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Silver Lake

Vilas County, WisconsinMesotrophic

Silver Lake earns an A — every scored parameter (clarity and phosphorus) rates among the best monitored waters in Vilas County. clarity and phosphorus rate similarly, so there is no obvious single lever to pull on watershed management.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of 19 ft puts Silver Lake in the middle of Wisconsin's depth distribution. The lake is compact at 57 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 191 graded lakes in Vilas County, Silver Lake sits at rank 51, above the county median.

Silver Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The fishery includes walleye among the lake's 5 documented species — a notable draw for Wisconsin anglers. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-02-15. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 12.1 ft. Phosphorus level: 17.8 µg/L. Trophic State Index: 43.

MetricValueGrade
Water Clarity (Secchi Depth)12.1 ftB
Phosphorus17.8 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)43Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth19 ft
Surface Area57 acres

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Silver Lake (14-day solunar calendar)

→ Is it safe to eat fish from Silver Lake? (mercury & PFAS guide)

Silver Lake fishing regulations (limits, seasons, special rules)

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Banded Mystery SnailChinese Mystery SnailEurasian Water-MilfoilPurple Loosestrife

Location

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County Ranking

Ranked #51 of 191 lakes in Vilas County

Nearby Lakes in Vilas County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 3 stations on file (most recent sample 2025).

Fish Species (DNR-rated)

Panfish(Abundant)Northern Pike(Common)Musky(Present)Largemouth Bass(Present)Walleye(Present)

EPA Impairment Status

Silver Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Cause unknown

Source: EPA ATTAINS assessment unit WI10007716 · 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: 2022-02-15

Monitoring stations: 1