What is the cleanest lake in Lincoln County, Oklahoma?

Prague Lake in Lincoln County is the highest-rated lake in Lincoln County, Oklahoma 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 Lincoln County, Oklahoma

Prague Lake in Lincoln County leads the rankings with a water quality grade of NR. Below are the top 4 cleanest monitored lakes in Lincoln County, Oklahoma, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Prague Lake	Lincoln	NR	-	-	-
2	Clark Lake	Lincoln	NR	-	-	-
3	Browns Lake	Lincoln	NR	-	-	-
4	Todd Lake	Lincoln	NR	-	-	-

Ranked List

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