What is the water quality grade for Lake of the Oaks?

Lake of the Oaks in Clark County, Wisconsin received a water quality grade of C (Fair). Phosphorus: 47 µg/L. Surface area: 65 acres.

Is Lake of the Oaks safe to swim in?

Generally safe for swimming, moderate water quality. Lake of the Oaks has an overall water quality grade of C. Always check local health department advisories before swimming.

Lake of the Oaks

Clark County, WisconsinLimited DataEutrophic

Lake of the Oaks is a 65-acre productive, nutrient-rich eutrophic lake in Clark County, MO. Water quality is graded C based on 1 sampling years through 2022. Compared to the 1 other monitored lakes in Clark County, Lake of the Oaks ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-07-28. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

No clarity data. Phosphorus level: 47 µg/L. Trophic State Index: 60.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No data
Phosphorus	47 µg/L	C
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	60	Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

Characteristic	Value
Surface Area	65 acres

Location

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County Ranking

Ranked #2 of 2 lakes in Clark County

Cleaner Lakes Within 30 Miles

Lake of the Oaks holds Grade C. One nearby lake has a higher grade.

B
Fox Valley Lake
Clark County · 18.1 mi · Higher grade (C → B)

See full comparison →

Nearby Lakes in Clark County

Fox Valley Lake

Clark County

Deer Ridge Comm. Lake

More Wisconsin Lake Rankings

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Top 25 by overall water quality score

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Grade A/B + low algae filter

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Panfish-rich, public access

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Other Grade C Lakes in Wisconsin

Aspen Lake Along Southern Arm

Warren County · Clarity: 3.8 ft

Mark Twain Lake by Hwy J

Ralls County · Clarity: 3.7 ft

Red Fox Lake

Warren County · Clarity: 3.3 ft

Waukomis Lake

Platte County · Clarity: 4.7 ft

Table Rock L. Nr. Greens Hollow Lake

Barry County · Clarity: 5 ft

Little Prairie Lake by Dam

Phelps County · Clarity: 4.9 ft

Eutrophic Lakes in Wisconsin

Aspen Lake Along Southern Arm Boathouse Lake Hunnewell Lake Long Branch Lk. Lake

Reservoir Info (USACE NID)

Lake of the Oaks is a man-made reservoir impounded by the Lake of The Oaks Dam (completed 1962), built primarily for recreation on the TR-BUCK RUN CR; earth-type dam, 34 ft tall and 990 ft long.

Surface area: 65 ac
Normal storage: 880 ac-ft
Max storage: 2,141 ac-ft
Drainage area: 900 sq mi
Hazard class: High
Owner: BEN KNAPP

Source: USACE National Inventory of Dams, NID ID MO10133 · Operator website

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2022-07-28

Monitoring stations: 1