What is the cleanest lake in Manitowoc County, Wisconsin?

Cedar Lake in Manitowoc County is the highest-rated lake in Manitowoc County, Wisconsin with an EPA water quality grade of B and 10.2 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 Manitowoc County, Wisconsin

Cedar Lake in Manitowoc County leads the rankings with a water quality grade of B and 10.2 ft of clarity. Below are the top 15 cleanest monitored lakes in Manitowoc County, Wisconsin, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Cedar Lake	Manitowoc	B	10.2 ft	17.7 µg/L	-
2	Wilke Lake	Manitowoc	B	7 ft	17.1 µg/L	-
3	Hartlaub Lake	Manitowoc	B	5 ft	35.8 µg/L	-
4	Spring Lake	Manitowoc	B	8 ft	19.3 µg/L	-
5	Pigeon Lake	Manitowoc	B	9.3 ft	15.3 µg/L	-
6	Shoe Lake	Manitowoc	B	7 ft	26.6 µg/L	-
7	English Lake	Manitowoc	B	7.5 ft	26.7 µg/L	-
8	Tuma Lake	Manitowoc	B	10 ft	19 µg/L	-
9	Harpt Lake	Manitowoc	C	3.5 ft	45.3 µg/L	-
10	Long Lake	Manitowoc	D	1.9 ft	90.4 µg/L	-
11	Bullhead Lake	Manitowoc	D	4.5 ft	70.7 µg/L	-
12	Gass Lake	Manitowoc	D	6 ft	61 µg/L	-
13	Weyers Lake	Manitowoc	D	6 ft	92.3 µg/L	-
14	Carstens Lake	Manitowoc	D	5.2 ft	89.7 µg/L	-
15	Silver Lake	Manitowoc	NR	-	-	-

Ranked List

More Answers for Manitowoc County, Wisconsin