What is the water quality grade for Lake Konstanz?

Lake Konstanz in Warren County, Wisconsin received a water quality grade of B (Good). Water clarity: 7.7 ft visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 1.6 µg/L. Surface area: 19 acres.

Is Lake Konstanz safe to swim in?

Good for swimming, clear water with low algae levels. Lake Konstanz has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 1.6 µg/L. Always check local health department advisories before swimming.

Lake Konstanz

Warren County, WisconsinOligotrophic

Lake Konstanz is a 19-acre cold, clear oligotrophic lake in Warren County, MO. Water quality is graded B based on 3 sampling years through 2024. Compared to the 15 other monitored lakes in Warren County, Lake Konstanz ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-19. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.7 ft. Phosphorus level: 7 µg/L. Chlorophyll-a: 1.6 µg/L. Trophic State Index: 38.

Metric	Value	Grade
Water Clarity (Secchi Depth)	7.7 ft	C
Phosphorus	7 µg/L	A
Chlorophyll-a (Algae)	1.6 µg/L	A
Trophic State Index (TSI)	38	Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

Characteristic	Value
Surface Area	19 acres

Location

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County Ranking

Ranked #2 of 16 lakes in Warren County

Cleaner Lakes Within 30 Miles

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

A
Alpine Lake
Warren County · 1 mi · Higher grade (B → A)

See full comparison →

Nearby Lakes in Warren County

Sherwood Lake Nr. Dam

Innsbrook Lake Nr. Dam

Warren County

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Other Grade B Lakes in Wisconsin

Table Rock Lake

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Taney County · Clarity: 8.7 ft

Forest Lake

Adair County · Clarity: 4.1 ft

Fox Valley Lake

Clark County · Clarity: 8.5 ft

Table Rock L. Nr. Perkins Hollow Lake

Stone County · Clarity: 6.9 ft

Loto Upstream of Dam Lake

Miller County · Clarity: 6.7 ft

Oligotrophic Lakes in Wisconsin

Lake Taneycomo @ Rockaway Beach Lake Wauwanoka Nr. Dam Lake Marseilles-Terre du Lac Lakes Lake Shayne-Terre du Lac Lakes

Reservoir Info (USACE NID)

Lake Konstanz is a man-made reservoir impounded by the Lake Konstanz Dam (completed 1999) on the TRIB. CHARRETTE CREEK; earth-type dam, 90 ft tall and 525 ft long.

Surface area: 19 ac
Normal storage: 86 ac-ft
Max storage: 103 ac-ft
Drainage area: 0.14 sq mi
Hazard class: High
Owner: INNSBROOK CORPORATION

Source: USACE National Inventory of Dams, NID ID MO32048 · Operator website

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-09-19

Monitoring stations: 1