What is the cleanest lake in Clinton County, Missouri?

Lake Arrowhead in Clinton County is the highest-rated lake in Clinton County, Missouri with an EPA water quality grade of D and 2 feet of water clarity.

How are these rankings calculated?

Lakes are graded A through F on nutrients and algae — total phosphorus, nitrogen, chlorophyll-a, and turbidity — against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Clinton County, Missouri

Lake Arrowhead in Clinton County leads the rankings with a water quality grade of D and 2 ft of clarity. Below are the top 4 cleanest monitored lakes in Clinton County, Missouri, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lake Arrowhead	Clinton	D	2 ft	68.2 µg/L	28.2 µg/L
2	Lake Arrowhead	Clinton	NR	-	-	-
3	Lake McGinness	Clinton	NR	-	-	-
4	Six Mile Lane Lake	Clinton	NR	-	-	-

Ranked List

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