What is the cleanest lake in Brule County, South Dakota?

Lake Sixteen in Brule County is the highest-rated lake in Brule County, South Dakota 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 Brule County, South Dakota

Lake Sixteen in Brule County leads the rankings with a water quality grade of NR. Below are the top 6 cleanest monitored lakes in Brule County, South Dakota, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lake Sixteen	Brule	NR	-	-	-
2	Jones Lake	Brule	NR	-	-	-
3	Mud Lake	Brule	NR	-	-	-
4	Red Lake	Brule	NR	-	-	-
5	Silver Lake	Brule	NR	-	-	-
6	Smith Lake	Brule	NR	-	-	-

Ranked List

More Answers for Brule County, South Dakota