What is the water quality grade for Gridley City Lake?

Gridley City Lake in Coffey County, Kansas received a water quality grade of C (Fair). Water clarity: 1.8 ft visibility. Phosphorus: 47.5 µg/L. Chlorophyll-a (algae): 27 µg/L.

Is Gridley City Lake safe to swim in?

Swim with caution, moderate algae may be present. Gridley City Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 27 µg/L. Always check local health department advisories before swimming.

Coffey County, Kansas

Gridley City Lake

Grade CFair · 1.8 ft clarity

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Eutrophic

Gridley City Lake is a productive, nutrient-rich eutrophic lake in Coffey County, Kansas. Water quality is graded C based on 2 sampling years through 2016. Compared to the 2 other monitored lakes in Coffey County, Gridley City Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2016-08-03. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

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Water Quality Grade: C, Fair

Very murky, less than 1.8 ft of visibility. Phosphorus level: 47.5 µg/L. Chlorophyll-a: 27 µg/L. Trophic State Index: 64.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.8 ft	F
Phosphorus	47.5 µg/L	C
Chlorophyll-a (Algae)	27 µg/L	D
Trophic State Index (TSI)	64	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Gridley City Lake

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