What is the cleanest lake in Shawano County, Wisconsin?

Big Lake in Shawano County is the highest-rated lake in Shawano County, Wisconsin with an EPA water quality grade of A and 8 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 Shawano County, Wisconsin

Big Lake in Shawano County leads the rankings with a water quality grade of A and 8 ft of clarity. Below are the top 23 cleanest monitored lakes in Shawano County, Wisconsin, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Big Lake	Shawano	A	8 ft	15 µg/L	2.7 µg/L
2	Koonz Lake	Shawano	A	10.8 ft	17 µg/L	1.7 µg/L
3	Malone Lake	Shawano	A	13.5 ft	18 µg/L	2.1 µg/L
4	Sams Lake	Shawano	A	11 ft	18 µg/L	2.2 µg/L
5	Mission Lake	Shawano	A	17.5 ft	17 µg/L	2.1 µg/L
6	Bealeau Lake	Shawano	A	11.5 ft	17 µg/L	2.2 µg/L
7	Round Lake	Shawano	B	11 ft	14.5 µg/L	-
8	Long Lake	Shawano	B	6 ft	22.3 µg/L	-
9	Grass Lake	Shawano	B	8.5 ft	15.6 µg/L	-
10	Loon Lake	Shawano	B	5.5 ft	20.8 µg/L	-
11	Pine Lake	Shawano	B	10.5 ft	13.8 µg/L	-
12	White Clay Lake	Shawano	C	5 ft	31.6 µg/L	-
13	Shawano Lake	Shawano	C	5.9 ft	29.6 µg/L	-
14	Upper Tigerton Pond	Shawano	NR	-	-	-
15	Mud Lake	Shawano	NR	-	-	-
16	Mud Lake	Shawano	NR	-	-	-
17	Lily Lake	Shawano	NR	-	-	-
18	Washington Lake	Shawano	NR	-	-	-
19	Lower Red Lake	Shawano	NR	-	-	-
20	Island Lake	Shawano	NR	-	-	-
21	Big Lake	Shawano	NR	-	-	-
22	Baker Lake	Shawano	NR	-	-	-
23	Homme Pond	Shawano	NR	-	-	-

Ranked List

More Answers for Shawano County, Wisconsin