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.
Watch Lake Content water quality
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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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | C |
| Phosphorus | 23.8 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 14 ft |
| Surface Area | 239 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.
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.125 m/yr | 5 |
| Phosphorus | ↑ Improving | -7.5 µg/L/yr | 2 |
Location
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
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
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)
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
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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