What is the cleanest lake in Rockbridge County, Virginia?

Lake Robertson in Rockbridge County is the highest-rated lake in Rockbridge County, Virginia with an EPA water quality grade of A and 13.9 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 Rockbridge County, Virginia

Lake Robertson in Rockbridge County leads the rankings with a water quality grade of A and 13.9 ft of clarity. Below are the top 2 cleanest monitored lakes in Rockbridge County, Virginia, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lake Robertson	Rockbridge	A	13.9 ft	10 µg/L	1.9 µg/L
2	Willow Lake	Rockbridge	NR	-	-	-

Ranked List

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