What is the cleanest lake in Sawyer County, Wisconsin?

Lac Courte Oreilles Lake in Sawyer County is the highest-rated lake in Sawyer County, Wisconsin with an EPA water quality grade of A and 12.2 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 Sawyer County, Wisconsin

Lac Courte Oreilles Lake in Sawyer County leads the rankings with a water quality grade of A and 12.2 ft of clarity. Below are the top 50 cleanest monitored lakes in Sawyer County, Wisconsin, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lac Courte Oreilles Lake	Sawyer	A	12.2 ft	15 µg/L	1.7 µg/L
2	Whitefish Lake	Sawyer	A	13.5 ft	14 µg/L	1.6 µg/L
3	Round Lake	Sawyer	A	21.1 ft	14 µg/L	0.9 µg/L
4	Indian Lake	Sawyer	A	6.5 ft	22.5 µg/L	3.6 µg/L
5	Christner Lake	Sawyer	A	12 ft	18.5 µg/L	2.1 µg/L
6	Sand Lake	Sawyer	A	10 ft	23.8 µg/L	4.1 µg/L
7	Ashegon Lake	Sawyer	A	10.5 ft	18 µg/L	2.7 µg/L
8	Blueberry Lake	Sawyer	A	14.8 ft	17 µg/L	1.6 µg/L
9	Little Round Lake	Sawyer	A	17.3 ft	12 µg/L	1 µg/L
10	Osprey Lake	Sawyer	A	16 ft	14.9 µg/L	1.4 µg/L
11	Grindstone Lake	Sawyer	A	17.4 ft	15 µg/L	1.4 µg/L
12	Lost Lake	Sawyer	A	10.6 ft	19.5 µg/L	1.6 µg/L
13	Durphee Lake	Sawyer	A	8.1 ft	22 µg/L	3.1 µg/L
14	Spider Lake	Sawyer	B	10.5 ft	14.1 µg/L	-
15	Callahan Lake	Sawyer	B	10.6 ft	21.9 µg/L	-
16	Clear Lake	Sawyer	B	17.3 ft	11.3 µg/L	-
17	Nelson Lake	Sawyer	B	5 ft	22.8 µg/L	-
18	Mud Lake	Sawyer	B	10 ft	18.5 µg/L	-
19	Tiger Cat Flowage Lake	Sawyer	B	10.8 ft	13.4 µg/L	-
20	Windigo Lake	Sawyer	B	11 ft	15.6 µg/L	-
21	Lake of the Pines	Sawyer	B	8 ft	16.6 µg/L	-
22	Little Sissabagama Lake	Sawyer	B	12.2 ft	14.7 µg/L	-
23	Connors Lake	Sawyer	B	11 ft	14.4 µg/L	-
24	Teal Lake	Sawyer	B	6.6 ft	16.5 µg/L	-
25	Lake Placid	Sawyer	B	15 ft	12.2 µg/L	-
26	Lost Land Lake	Sawyer	B	10 ft	17.1 µg/L	-
27	Sissabagama Lake	Sawyer	B	8 ft	18.7 µg/L	-
28	Billy Boy Flowage Lake	Sawyer	B	-	16 µg/L	-
29	Green Lake	Sawyer	C	4.7 ft	34 µg/L	5.8 µg/L
30	Pike Lake	Sawyer	C	7.6 ft	30.5 µg/L	5.6 µg/L
31	Spring Lake	Sawyer	C	8.9 ft	27 µg/L	5.2 µg/L
32	Moose Lake	Sawyer	C	2 ft	28.9 µg/L	-
33	Chippewa Flowage -North of Cranberry Bars Lake	Sawyer	C	4.9 ft	32 µg/L	10 µg/L
34	Lower Clam Lake	Sawyer	C	5.5 ft	29.5 µg/L	-
35	Gurno Lake	Sawyer	C	10 ft	25 µg/L	4.1 µg/L
36	Lake Chetac	Sawyer	D	-	56.3 µg/L	-
37	McDermott Lake	Sawyer	NR	-	-	-
38	Garbutt Lake	Sawyer	NR	-	-	-
39	Thomas Lake	Sawyer	NR	-	-	-
40	Bennett Lake	Sawyer	NR	-	-	-
41	Deer Lake	Sawyer	NR	-	-	-
42	White Birch Lake	Sawyer	NR	-	-	-
43	Windfall Lake	Sawyer	NR	-	-	-
44	Miller Lake	Sawyer	NR	-	-	-
45	Boribo Lake	Sawyer	NR	-	-	-
46	Two Boys Lake	Sawyer	NR	-	-	-
47	Two Axe Lake	Sawyer	NR	-	-	-
48	Mud Lake	Sawyer	NR	-	-	-
49	Barker Lake	Sawyer	NR	-	-	-
50	Hunter Lake	Sawyer	NR	-	-	-

Ranked List

More Answers for Sawyer County, Wisconsin