What is the water quality grade for Kinmundy Old Lake?

Kinmundy Old Lake in Marion County, Wisconsin received a water quality grade of F (Very Poor). Water clarity: 1.5 ft visibility. Phosphorus: 212.5 µg/L.

Is Kinmundy Old Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Kinmundy Old Lake has an overall water quality grade of F. Always check local health department advisories before swimming.

Kinmundy Old Lake

Marion County, WisconsinHypereutrophic

Kinmundy Old Lake is a highly nutrient-loaded hypereutrophic lake in Marion County, IL. Water quality is graded F based on 2 sampling years through 2022. Compared to the 5 other monitored lakes in Marion County, Kinmundy Old Lake ranks #6 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-10-05. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.5 ft of visibility. Phosphorus level: 212.5 µg/L. Trophic State Index: 76.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.5 ft	F
Phosphorus	212.5 µg/L	F
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	76	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Location

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County Ranking

Ranked #6 of 6 lakes in Marion County

Cleaner Lakes Within 30 Miles

Kinmundy Old Lake holds Grade F. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Marion County

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 F Lakes in Wisconsin

Lake Charlemagne

Cook County · Clarity: 2 ft

Bode Lake North

Cook County · Clarity: 1.5 ft

Great Lakes Quarries West

Cook County · Clarity: 2.5 ft

Bull Frog Lake

Cook County · Clarity: 3 ft

Belly Deep Slough Lake

Cook County · Clarity: 0.7 ft

Sauk Lake

Cook County · Clarity: 1 ft

Hypereutrophic Lakes in Wisconsin

Bode Lake North Belly Deep Slough Lake Sauk Lake Washington Park Lagoon Lake

Reservoir Info (USACE NID)

Kinmundy Old Lake is a man-made reservoir impounded by the Kinmundy Lake Dam (completed 1885), built primarily for recreation on the TRIB EAST FORK KASKASKIA RIVER; earth-type dam, 25 ft tall and 1,050 ft long.

Normal storage: 87 ac-ft
Max storage: 121 ac-ft
Hazard class: Low
Owner: CITY OF KINMUNDY

Source: USACE National Inventory of Dams, NID ID IL00248 · Operator website · Matched by proximity (0.19 km)

EPA Impairment Status

Kinmundy Old Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Cause unknown

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit IL_ROZY · 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

Most recent sample: 2022-10-05

Monitoring stations: 2