Eutrophic Lakes in Minnesota

770 eutrophic lakes in Minnesota. High nutrients, frequent algae, reduced clarity.

A eutrophic lake is a productive ecosystem with the trade-offs that come with productivity: more food at the base of the food web, more clarity reduction by mid-summer, more dissolved-oxygen variability near the bottom. 770 Minnesota lakes register as eutrophic. Only 0% are deep — eutrophy correlates with shallowness, agricultural watersheds, and the kind of nutrient-input history that takes decades to shift.

Eutrophic lakes typically grade C or D on the LakeGrade rubric. The same nutrient richness that defines the trophic class drives the lower grade.

#	Lake	County	Grade	Clarity	Depth	TSI
1	Kettle Lake	Carlton	B	-	-	53
2	Big Rice Lake	St. Louis	B	-	-	51
3	Erie Lake	Meeker	B	-	-	51
4	North Lake 3	Goodhue	B	-	-	52
5	Jessie Lake	Beltrami	B	4.6 ft	-	50
6	South Lindstrom Lake	Chisago	B	5.2 ft	-	50
7	Chevans Lake Deep	Cook	B	1.9 ft	-	53
8	Big Lake	Stearns	B	6.9 ft	-	50
9	Unnamed Lake	Hennepin	B	4.3 ft	-	51
10	Lemay Lake	Dakota	B	6.9 ft	-	50
11	Big Pine Lake	Otter Tail	B	7 ft	-	50
12	White Iron Lake	Lake	B	4.5 ft	-	51
13	Arrowhead Lake	Crow Wing	B	6.9 ft	-	51
14	Comfort Lake	Chisago	B	7 ft	-	51
15	Sand Hill Lake	Polk	B	6.9 ft	-	50
16	Elbow Lake	Cook	B	3.7 ft	-	52
17	Rush Lake	Otter Tail	B	6.9 ft	-	51
18	Upper Twin Lake	Hubbard	B	6.9 ft	-	50
19	Toad Lake	Becker	B	7 ft	-	50
20	Badger Lake	Polk	B	6.7 ft	-	51
21	Sarah Lake	Polk	B	7.9 ft	-	50
22	Waverly Lake	Wright	B	7.4 ft	-	50
23	Shoepack Lake	St. Louis	B	4.6 ft	-	51
24	Kittleson Lake	Polk	B	7.1 ft	-	50
25	Peter Lake	Hennepin	B	9.9 ft	-	51
26	Magda Lake	Hennepin	B	14.1 ft	-	51
27	Beaver Hut Lake	Lake	B	3.4 ft	-	53
28	West Sturgeon Lake	Itasca	B	4.1 ft	-	51
29	Dahler Lake	Crow Wing	B	4.4 ft	-	50
30	Vermillion Lake	Cass	B	7.1 ft	-	50
31	Central Mystic Lake	Scott	B	-	-	55
32	Round Lake	Hennepin	C	7.4 ft	-	52
33	Horseshoe Lake	Chisago	C	4.6 ft	-	52
34	Schram Lake	Beltrami	C	3.9 ft	-	51
35	Green Lake	Chisago	C	6 ft	-	50
36	George Lake	Anoka	C	7.3 ft	-	50
37	Coon Lake	Anoka	C	5.6 ft	-	51
38	Jensen Lake	Dakota	C	5 ft	-	52
39	Simian Lake	St. Louis	C	3.9 ft	-	52
40	Spruce Lake	Carlton	C	2.3 ft	-	55
41	Rice Portage Lake	Carlton	C	1.3 ft	-	57
42	Middle Pigeon Lake	Itasca	C	7.5 ft	-	53
43	Fannie Lake	Isanti	C	7 ft	-	52
44	Teal Lake Deep	Cook	C	3.3 ft	-	50
45	Mud Lake	Wright	C	5.6 ft	-	52
46	Birch Lake	St. Louis	C	3.9 ft	-	53
47	Round Lake	Ramsey	C	8.2 ft	-	54
48	Long Lake	Meeker	C	7.5 ft	-	51
49	Unnamed Lake	St. Louis	C	4.8 ft	-	53
50	Unnamed Lake	Otter Tail	C	3.9 ft	-	54
51	Twin Lake	Ramsey	C	7.9 ft	-	52
52	Elms Lake	Isanti	C	6.9 ft	-	55
53	Blue Lake	Isanti	C	8.9 ft	-	54
54	Eagle Lake	Carlton	C	7 ft	-	52
55	Auburn Lake	Carver	C	7.2 ft	-	51
56	Colby Lake	St. Louis	C	3.5 ft	-	54
57	Johanna Lake	Ramsey	C	7.2 ft	-	53
58	Fish Lake	Dakota	C	6.9 ft	-	53
59	Sand Lake	Carlton	C	5 ft	-	53
60	Beaver Lake	Ramsey	C	7.9 ft	-	53
61	Battle Creek Lake	Washington	C	7.4 ft	-	54
62	Union Lake	Wright	C	5.5 ft	-	50
63	Island Lake	Itasca	C	8.9 ft	-	50
64	Portage Lake	Hubbard	C	5.7 ft	-	52
65	Gull Lake	Beltrami	C	5.9 ft	-	52
66	Koronis Lake	Stearns	C	6 ft	-	51
67	Silver Lake	Ramsey	C	7 ft	-	56
68	Goose Lake	Chisago	C	4.5 ft	-	54
69	Roy Lake	Mahnomen	C	6 ft	-	51
70	Rock Lake	Cass	C	5.9 ft	-	52
71	Rice Marsh Lake	Hennepin	C	7.7 ft	-	51
72	Big Sandy Lake	Aitkin	C	4.5 ft	-	54
73	Mary Lake	Crow Wing	C	4.1 ft	-	52
74	Jessie Lake	Itasca	C	8 ft	-	50
75	Jessie Lake	Douglas	C	6.8 ft	-	54
76	Gem Lake	Ramsey	C	6.9 ft	-	53
77	Bde Maka Ska Lake	Hennepin	C	10.7 ft	-	56
78	Lower Mission Lake	Crow Wing	C	6.9 ft	-	53
79	Thomas Lake	Dakota	C	5.6 ft	-	51
80	Francis Lake	Meeker	C	6 ft	-	51
81	Wolf Lake	Becker	C	3.9 ft	-	54
82	Fall Lake	Lake	C	5.6 ft	-	50
83	Perch Lake	Carlton	C	2.2 ft	-	55
84	Perch Lake	Lincoln	C	9.3 ft	-	54
85	South Center Lake	Chisago	C	4.9 ft	-	55
86	Lower Twin Lake	Wadena	C	6.9 ft	-	52
87	Chisago Lake	Chisago	C	4 ft	-	55
88	Mcdonald Lake	Washington	C	5 ft	-	51
89	Cedar Island Lake	St. Louis	C	3.8 ft	-	53
90	Boot Lake	Anoka	C	6.7 ft	-	52
91	Sibley Lake	Crow Wing	C	4.9 ft	-	53
92	Grove Lake	Pope	C	5.1 ft	-	52
93	Lone Lake	Mahnomen	C	7.1 ft	-	55
94	Stocking Lake	Wadena	C	7.5 ft	-	51
95	Waconia Lake	Carver	C	7.3 ft	-	51
96	Crow R Mill Pond	Kandiyohi	C	6 ft	-	51
97	Kings Lake	Stearns	C	7.4 ft	-	54
98	Miller Lake	Carlton	C	1.8 ft	-	53
99	Mayo Lake	Crow Wing	C	4.8 ft	-	54
100	Seventh Crow Wing Lake	Hubbard	C	6.6 ft	-	50

All eutrophic lakes (MN+WI) →Wisconsin version →All Minnesota lakes →

Source: EPA National Aquatic Resource Surveys, 2026.