What is the water quality grade for Marais des Cygnes Nwr Lake?

Marais des Cygnes Nwr Lake in Linn County, Kansas received a water quality grade of F (Very Poor). Water clarity: 0.6 ft visibility. Phosphorus: 810 µg/L. Chlorophyll-a (algae): 255 µg/L.

Is Marais des Cygnes Nwr Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Marais des Cygnes Nwr Lake has an overall water quality grade of F. Algae concentration (chlorophyll-a) is 255 µg/L. Always check local health department advisories before swimming.

Linn County, Kansas

Marais des Cygnes Nwr Lake

Grade FVery Poor · 0.6 ft clarity

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Hypereutrophic

Marais des Cygnes Nwr Lake is a highly nutrient-loaded hypereutrophic lake in Linn County, Kansas. Water quality is graded F based on 2 sampling years through 2014. Compared to the 9 other monitored lakes in Linn County, Marais des Cygnes Nwr Lake ranks #10 for water quality.

Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2014-07-08. Grade methodology: LakeGrade methodology.

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

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Water Quality Grade: F, Very Poor

Very murky, less than 0.6 ft of visibility. Phosphorus level: 810 µg/L. Chlorophyll-a: 255 µg/L. Trophic State Index: 90.

Metric	Value	Grade
Water Clarity (Secchi Depth)	0.6 ft	F
Phosphorus	810 µg/L	F
Chlorophyll-a (Algae)	255 µg/L	F
Trophic State Index (TSI)	90	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Where to stay near Marais des Cygnes Nwr Lake

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