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B

Lake Content

Vilas County, WisconsinMesotrophic

Lake Content carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI near 48 places Lake Content in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. Lake Content is a shallow lake at 14 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 239 acres, Lake Content fits the Wisconsin median for monitored lakes, with partial shoreline records. Lake Content sits at rank 136 of 191 in Vilas County, in the lower half of the local distribution.

An invasive species record — Banded Mystery Snail — has been logged at Lake Content; Wisconsin DNR maintains the official infested-waters list. The fishery includes walleye alongside the lake's other 5 documented species — a notable draw for Wisconsin anglers. 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 2025-09-02. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 9 ft. Phosphorus level: 23.8 µg/L. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)9 ftC
Phosphorus23.8 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth14 ft
Surface Area239 acres

Fish Species

Click a species to see every graded lake where it is documented.

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

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

Lake Content 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 Snail

Water Quality Trend: Improving

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.125 m/yr5
Phosphorus Improving-7.5 µg/L/yr2
See year-by-year chart →

Location

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County Ranking

Ranked #136 of 191 lakes in Vilas County

Cleaner Lakes Within 30 Miles

Lake Content holds Grade B. One nearby lake has a higher grade.

See full comparison →

Nearby Lakes in Vilas County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1995. 1 station on file (most recent sample 2025).

Fish Species (DNR-rated)

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

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Source: EPA ATTAINS assessment unit WI10007633 · 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

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2025-09-02

Monitoring stations: 1

Where to stay near Lake Content

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