What is the cleanest lake in Grays Harbor County, Washington?

Wynoochee Lake in Grays Harbor County is the highest-rated lake in Grays Harbor County, Washington 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 Grays Harbor County, Washington

Wynoochee Lake in Grays Harbor County leads the rankings with a water quality grade of NR. Below are the top 5 cleanest monitored lakes in Grays Harbor County, Washington, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Wynoochee Lake	Grays Harbor	NR	-	-	-
2	Lake Aberdeen	Grays Harbor	NR	-	-	-
3	Sylvia Lake	Grays Harbor	NR	-	-	-
4	Failor Lake	Grays Harbor	NR	-	-	-
5	Duck Lake	Grays Harbor	NR	-	-	-

Ranked List

More Answers for Grays Harbor County, Washington