What is the water quality grade for Innsbrook Lake Nr. Dam?

Innsbrook Lake Nr. Dam in Warren County, Wisconsin received a water quality grade of B (Good). Water clarity: 5.2 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 5 µg/L. Surface area: 39 acres.

Is Innsbrook Lake Nr. Dam safe to swim in?

Good for swimming, clear water with low algae levels. Innsbrook Lake Nr. Dam has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 5 µg/L. Always check local health department advisories before swimming.

Innsbrook Lake Nr. Dam

Warren County, WisconsinMesotrophic

Innsbrook Lake Nr. Dam is a 39-acre mesotrophic 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, Innsbrook Lake Nr. Dam ranks #7 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-26. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Murky, only visible to about 5.2 ft. Phosphorus level: 17 µg/L. Chlorophyll-a: 5 µg/L. Trophic State Index: 48.

Metric	Value	Grade
Water Clarity (Secchi Depth)	5.2 ft	D
Phosphorus	17 µg/L	A
Chlorophyll-a (Algae)	5 µg/L	B
Trophic State Index (TSI)	48	Mesotrophic

Moderate nutrients, good water quality

Lake Details

Characteristic	Value
Surface Area	39 acres

Location

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County Ranking

Ranked #7 of 16 lakes in Warren County

Cleaner Lakes Within 30 Miles

Innsbrook Lake Nr. Dam holds Grade B. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Warren County

Sherwood Lake Nr. Dam

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 B Lakes in Wisconsin

Table Rock Lake

Taney County · Clarity: 10 ft

Lake Taneycomo @ Rockaway Beach

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

Mesotrophic Lakes in Wisconsin

Table Rock Lake Forest Lake Fox Valley Lake Table Rock L. Nr. Perkins Hollow Lake

Reservoir Info (USACE NID)

Innsbrook Lake Nr. Dam is a man-made reservoir impounded by the Lake Innsbrook Dam (completed 1975), built primarily for recreation on the TRIB CHARRETTE CREEK; earth-type dam, 46 ft tall and 700 ft long.

Surface area: 39 ac
Normal storage: 532 ac-ft
Max storage: 974 ac-ft
Drainage area: 3.84 sq mi
Hazard class: High
Owner: INNSBROOK OWNERS ASSOCIATION

Source: USACE National Inventory of Dams, NID ID MO11243 · Operator website · Matched by proximity (0.06 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-09-26

Monitoring stations: 1