What is the cleanest lake in Beaver County, Utah?

Robinson-Tanner Reservoir in Beaver County is the highest-rated lake in Beaver County, Utah with an EPA water quality grade of NR.

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 Beaver County, Utah

Robinson-Tanner Reservoir in Beaver County leads the rankings with a water quality grade of NR. Below are the top 2 cleanest monitored lakes in Beaver County, Utah, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Robinson-Tanner Reservoir	Beaver	NR	-	-	-
2	Lower Big Wash Reservoir	Beaver	NR	-	-	-

Ranked List

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