What is the water quality grade for Marion Lake?

Marion Lake in Marion County, Kansas received a water quality grade of D (Poor). Water clarity: 2 ft visibility. Phosphorus: 230 µg/L. Chlorophyll-a (algae): 37.9 µg/L.

Is Marion Lake safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Marion Lake has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 37.9 µg/L. Always check local health department advisories before swimming.

Marion County, Kansas

Marion Lake

Grade DPoor · 2 ft clarity

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Hypereutrophic

Marion Lake is a highly nutrient-loaded hypereutrophic lake in Marion County, Kansas. Water quality is graded D based on 2 sampling years through 2022. Compared to the 1 other monitored lakes in Marion County, Marion Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2022-08-04. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 2 ft of visibility. Phosphorus level: 230 µg/L. Chlorophyll-a: 37.9 µg/L. Trophic State Index: 72.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2 ft	F
Phosphorus	230 µg/L	F
Chlorophyll-a (Algae)	37.9 µg/L	D
Trophic State Index (TSI)	72	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Where to stay near Marion Lake

Compare lakeside cabins, hotels, and vacation rentals near Marion Lake in Marion County, Kansas — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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