What is the water-quality readings for Black Oak Lake?

Black Oak Lake has nutrient and algae measurements on record from state and federal monitoring. Water clarity reads 29 feet (Secchi depth). Phosphorus levels are 10.6 µg/L. Black Oak Lake's nutrient and algae readings match or beat the Wisconsin state average.

Where is Black Oak Lake?

Black Oak Lake is located in Vilas County, Wisconsin. It spans 564 acres with a maximum depth of 85 feet. 6 fish species have been documented in the lake.

Swimming at Black Oak Lake: Water Readings and Advisories

Black Oak Lake in Vilas County, Wisconsin has nutrient and algae measurements on record from state and federal monitoring. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 29 ft visibility. Phosphorus: 10.6 µg/L. Always check local health department advisories before swimming.

Key Metrics

Metric	Value
Water Clarity (Secchi Depth)	29 ft
Phosphorus	10.6 μg/L
Maximum Depth	85 ft
Location	Vilas County, Wisconsin

How does Black Oak Lake compare?

With an overall water-quality readings of —, Black Oak Lake matches or beats the Wisconsin state average. It ranks #41 of 103 lakes in Vilas County by water quality score.

Water clarity (Secchi depth) sits at 29 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.

Watch Black Oak Lake water quality

Get an email when the clarity or algae readings change. Unsubscribe anytime.

More on Black Oak Lake

How clean is Black Oak Lake? →What fish are in Black Oak Lake? →Full water quality report →Vilas County lakes →Cleanest lakes in Vilas County →Cleanest lakes in Wisconsin →