What is the water quality grade for Marion Co Lake?

Marion Co Lake in Marion County, Kansas received a water quality grade of D (Poor). Water clarity: 2.9 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 41.6 µg/L.

Is Marion Co Lake safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Marion Co Lake has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 41.6 µg/L. Always check local health department advisories before swimming.

Marion County, Kansas

Marion Co Lake

Grade DPoor · 2.9 ft clarity

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Eutrophic

Marion Co Lake is a productive, nutrient-rich eutrophic lake in Marion County, Kansas. Water quality is graded D based on 2 sampling years through 2018. Compared to the 1 other monitored lakes in Marion County, Marion Co Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2018-07-31. 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 2.9 ft of visibility. Phosphorus level: 40 µg/L. Chlorophyll-a: 41.6 µg/L. Trophic State Index: 62.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.9 ft	F
Phosphorus	40 µg/L	C
Chlorophyll-a (Algae)	41.6 µg/L	F
Trophic State Index (TSI)	62	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Marion Co Lake

Compare lakeside cabins, hotels, and vacation rentals near Marion Co 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.

Top-rated places to stay near Marion Co Lake