What is the cleanest lake in Knox County, Tennessee?

Tennessee River Lake in Knox County is the highest-rated lake in Knox County, Tennessee with an EPA water quality grade of C.

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 Knox County, Tennessee

Tennessee River Lake in Knox County leads the rankings with a water quality grade of C. Below are the top 1 cleanest monitored lakes in Knox County, Tennessee, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Tennessee River Lake	Knox	C	-	33 µg/L	-

Ranked List

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