Question 1

Cleanest Lakes in Clearwater County, Minnesota?

Accepted Answer

Long Lake in Clearwater County leads the rankings with a water quality grade of A and 20 ft of clarity. Below are the top 36 cleanest monitored lakes in Clearwater County, Minnesota, ranked by EPA water quality score.

Question 2

What is the cleanest lake in Clearwater County, Minnesota?

Accepted Answer

Long Lake in Clearwater County is the highest-rated lake in Clearwater County, Minnesota with an EPA water quality grade of A and 20 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	Clearwater	A	20 ft	7 µg/L	-
2	Pickerel Lake	Clearwater	A	16.1 ft	8 µg/L	-
3	Lone Lake	Clearwater	A	19.4 ft	7 µg/L	-
4	Morrison Lake	Clearwater	A	39.4 ft	13 µg/L	-
5	Little Rock Lake	Clearwater	A	15.1 ft	9.5 µg/L	-
6	Long Lost Lake	Clearwater	A	23 ft	10.5 µg/L	-
7	Schantzen Lake	Clearwater	A	16.1 ft	9.5 µg/L	-
8	Ozawindib Lake	Clearwater	A	19 ft	7 µg/L	-
9	Clearwater Lake	Clearwater	A	10.3 ft	15 µg/L	-
10	Island Lake	Clearwater	A	14.1 ft	15 µg/L	-
11	Rock Lake	Clearwater	A	11.2 ft	16.5 µg/L	-
12	Elk Lake	Clearwater	A	12.4 ft	18.5 µg/L	-
13	Bagley Lake	Clearwater	A	12.5 ft	19 µg/L	-
14	Minnow Lake	Clearwater	A	10.5 ft	14 µg/L	-
15	Falk Lake	Clearwater	A	13.3 ft	14 µg/L	-
16	Big Lasalle Lake	Clearwater	A	10.3 ft	9 µg/L	-
17	Waptus Lake	Clearwater	A	14.1 ft	15 µg/L	-
18	Hoot Owl Lake	Clearwater	A	12.1 ft	10.5 µg/L	-
19	Mckenzie Lake	Clearwater	A	12.6 ft	13 µg/L	-
20	Cesar Lake	Clearwater	A	11.2 ft	17.5 µg/L	-
21	Peterson Lake	Clearwater	B	11.5 ft	21.5 µg/L	-
22	Pine Lake	Clearwater	B	10.2 ft	20 µg/L	-
23	Walker Brook Lake	Clearwater	B	11 ft	20 µg/L	-
24	Kibbee Lake	Clearwater	B	9 ft	13 µg/L	-
25	Jackson Lake	Clearwater	B	8.9 ft	15.5 µg/L	-
26	Andrews Lake	Clearwater	B	8.9 ft	16.5 µg/L	-
27	Johnson Lake	Clearwater	B	7.5 ft	26 µg/L	-
28	Minerva Lake	Clearwater	B	7.3 ft	26 µg/L	-
29	Lomond Lake	Clearwater	B	9.8 ft	21 µg/L	-
30	Second Lake	Clearwater	B	7.2 ft	21 µg/L	-
31	East Four-Legged Lake	Clearwater	B	4.6 ft	11 µg/L	-
32	First Lake	Clearwater	B	9.5 ft	21 µg/L	-
33	Spike Lake	Clearwater	C	8.5 ft	30.5 µg/L	-
34	Itasca Lake	Clearwater	C	6.3 ft	28 µg/L	-
35	Rockstad Lake	Clearwater	C	4 ft	48 µg/L	-
36	Lindberg Lake	Clearwater	C	4.9 ft	33 µg/L	-

Cleanest Lakes in Clearwater County, Minnesota

Ranked List

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