What is the cleanest lake in St. Joseph County, Indiana?

Chamberlain Lake in St. Joseph County is the highest-rated lake in St. Joseph County, Indiana 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 St. Joseph County, Indiana

Chamberlain Lake in St. Joseph County leads the rankings with a water quality grade of NR. Below are the top 10 cleanest monitored lakes in St. Joseph County, Indiana, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Chamberlain Lake	St. Joseph	NR	-	-	-
2	Pleasant Lake	St. Joseph	NR	-	-	-
3	Riddles Lake	St. Joseph	NR	-	-	-
4	Sousley Lake	St. Joseph	NR	-	-	-
5	North Chain Lake	St. Joseph	NR	-	-	-
6	South Chain Lake	St. Joseph	NR	-	-	-
7	Mud Lake	St. Joseph	NR	-	-	-
8	South Clear Lake	St. Joseph	NR	-	-	-
9	Pinhook Lake	St. Joseph	NR	-	-	-
10	Saint Josephs Lake	St. Joseph	NR	-	-	-

Ranked List

More Answers for St. Joseph County, Indiana