Question 1

Cleanest Lakes in Washburn County, Wisconsin?

Accepted Answer

Long Lake in Washburn County leads the rankings with a water quality grade of A and 29.5 ft of clarity. Below are the top 27 cleanest monitored lakes in Washburn County, Wisconsin, ranked by EPA water quality score.

Question 2

What is the cleanest lake in Washburn County, Wisconsin?

Accepted Answer

Long Lake in Washburn County is the highest-rated lake in Washburn County, Wisconsin with an EPA water quality grade of A and 29.5 feet of water clarity.

Question 3

How are these rankings calculated?

Accepted Answer

Lakes are graded A through F using the Metropolitan Council methodology, which combines Secchi depth (water clarity), total phosphorus, and chlorophyll-a (algae) into a single score. Source data comes from the EPA Water Quality Portal.

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Long Lake	Washburn	A	29.5 ft	17.5 µg/L	-
2	Balsam Lake	Washburn	A	31.2 ft	19.3 µg/L	-
3	Bass Lake	Washburn	A	52.5 ft	12.3 µg/L	-
4	Horseshoe Lake	Washburn	A	42.7 ft	12.6 µg/L	-
5	Stone Lake	Washburn	A	75.5 ft	10.8 µg/L	-
6	Big Mckenzie Lake	Washburn	A	33.6 ft	17 µg/L	-
7	Tozer Lake	Washburn	A	50.9 ft	13.2 µg/L	-
8	North Twin Lake	Washburn	A	29.5 ft	13.7 µg/L	-
9	Matthews Lake	Washburn	A	44.3 ft	13.7 µg/L	-
10	Lower Mckenzie Lake	Washburn	A	36.1 ft	18.8 µg/L	-
11	Deep Lake	Washburn	A	22.1 ft	16.5 µg/L	-
12	Shell Lake	Washburn	A	50.9 ft	15.2 µg/L	-
13	South Twin Lake	Washburn	A	46.8 ft	11 µg/L	-
14	Slim Lake	Washburn	A	39.4 ft	13.6 µg/L	-
15	Lake Nancy	Washburn	A	47.6 ft	13.5 µg/L	-
16	Mclain Lake	Washburn	A	31.2 ft	14.2 µg/L	-
17	Middle Kimball Lake	Washburn	A	52.5 ft	13.1 µg/L	-
18	Gilmore Lake	Washburn	A	32.8 ft	16.3 µg/L	-
19	Bean Lake	Washburn	A	32.8 ft	16.2 µg/L	-
20	Lower Kimball Lake	Washburn	A	19.7 ft	18.5 µg/L	-
21	Birch Lake	Washburn	A	18 ft	27.6 µg/L	-
22	Upper Kimball Lake	Washburn	A	32 ft	20.4 µg/L	-
23	Spooner Lake	Washburn	A	26.2 ft	22.7 µg/L	-
24	Kekegama Lake	Washburn	A	17.2 ft	26.4 µg/L	-
25	Yellow River Flowage Lake	Washburn	A	32.8 ft	23.1 µg/L	-
26	Potato Lake	Washburn	B	32.4 ft	33.2 µg/L	-
27	Minong Flowage Lake	Washburn	B	12.3 ft	37.2 µg/L	-

Cleanest Lakes in Washburn County, Wisconsin

Ranked List

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