What is the cleanest lake in Stearns County, Minnesota?

Long Lake in Stearns County is the highest-rated lake in Stearns County, Minnesota with an EPA water quality grade of A and 13.5 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 Stearns County, Minnesota

Long Lake in Stearns County leads the rankings with a water quality grade of A and 13.5 ft of clarity. Below are the top 50 cleanest monitored lakes in Stearns County, Minnesota, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Long Lake	Stearns	A	13.5 ft	19 µg/L	4.4 µg/L
2	Big Spunk Lake	Stearns	A	10 ft	14 µg/L	3.7 µg/L
3	Crooked Lake	Stearns	A	15.5 ft	16 µg/L	2.2 µg/L
4	Big Fish Lake	Stearns	A	20 ft	9 µg/L	1.8 µg/L
5	School Section Lake	Stearns	A	9.8 ft	14 µg/L	2.1 µg/L
6	Big Lake	Stearns	C	6.9 ft	26.5 µg/L	10.7 µg/L
7	Pirz Lake	Stearns	C	12 ft	26 µg/L	6.1 µg/L
8	Kraemer Lake	Stearns	C	6.9 ft	22 µg/L	11.6 µg/L
9	George Lake	Stearns	C	7.3 ft	23 µg/L	10.7 µg/L
10	Koronis Lake	Stearns	C	6 ft	27 µg/L	13.8 µg/L
11	Augusta Lake	Stearns	C	5.3 ft	25.5 µg/L	13.4 µg/L
12	Pearl Lake	Stearns	C	3.9 ft	20.5 µg/L	13 µg/L
13	Warner Lake	Stearns	C	6 ft	22 µg/L	12.8 µg/L
14	Sauk Lake	Stearns	D	3.9 ft	52 µg/L	22.3 µg/L
15	Krays Lake	Stearns	D	3.5 ft	150 µg/L	21 µg/L
16	Louisa Lake	Stearns	D	5.7 ft	65 µg/L	24.9 µg/L
17	Schneider Lake	Stearns	D	12 ft	64 µg/L	18 µg/L
18	Horseshoe Lake	Stearns	F	4 ft	120 µg/L	44.5 µg/L
19	Rice Lake	Stearns	F	3 ft	50 µg/L	39.5 µg/L
20	North Brown'S Lake	Stearns	F	4 ft	67.5 µg/L	31 µg/L
21	Cedar Island Lake	Stearns	F	3.5 ft	63.5 µg/L	44 µg/L
22	Knaus Lake	Stearns	F	2.5 ft	143 µg/L	31 µg/L
23	Marie Lake	Stearns	F	5.1 ft	75 µg/L	42.1 µg/L
24	Bolfing Lake	Stearns	F	6.3 ft	59 µg/L	51.6 µg/L
25	Willow Lake	Stearns	NR	-	-	-
26	Maria Lake	Stearns	NR	-	-	-
27	Dallas Lake	Stearns	NR	-	-	-
28	Fuller Lake	Stearns	NR	-	-	-
29	Bunt Lake	Stearns	NR	-	-	-
30	Swamp Lake	Stearns	NR	-	-	-
31	Achman Lake	Stearns	NR	-	-	-
32	Lake Anna	Stearns	NR	-	-	-
33	Pine Lake	Stearns	NR	-	-	-
34	Englemeier Lake	Stearns	NR	-	-	-
35	Linneman Lake	Stearns	NR	-	-	-
36	Minnie Lake	Stearns	NR	-	-	-
37	Fifth Lake	Stearns	NR	-	-	-
38	Pitts Lake	Stearns	NR	-	-	-
39	Little Rice Lake	Stearns	NR	-	-	-
40	Koop Lake	Stearns	NR	-	-	-
41	Kalla Lake	Stearns	NR	-	-	-
42	Schmid Lake	Stearns	NR	-	-	-
43	Long Lake	Stearns	NR	-	-	-
44	Island Lake	Stearns	NR	-	-	-
45	Stump Lake	Stearns	NR	-	-	-
46	Rossier Lake	Stearns	NR	-	-	-
47	Bakers Lake	Stearns	NR	-	-	-
48	Mud Lake	Stearns	NR	-	-	-
49	Rausch Lake	Stearns	NR	-	-	-
50	Mund Lake	Stearns	NR	-	-	-

Ranked List

More Answers for Stearns County, Minnesota