Eutrophic Lakes in North Dakota

95 eutrophic lakes in North Dakota. 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. 95 North Dakota 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	Patterson Lake	Stark	B	-	-	51
2	Lake Ashtabula	Barnes	B	3.4 ft	-	51
3	Clark Lake	Stutsman	B	10 ft	-	50
4	Jamestown Reservoir	Stutsman	B	7.2 ft	-	50
5	Pheasant Lake	Dickey	B	3.6 ft	-	51
6	Blacktail Dam Lake	Williams	B	7.2 ft	-	50
7	Lake Audubon	McLean	B	4.7 ft	-	50
8	Lake Tschida	Grant	C	6 ft	-	52
9	Carlson-Tande Dam Lake	Griggs	C	5.6 ft	-	52
10	Fordville Dam Lake	Grand Forks	C	4.4 ft	-	51
11	Mooreton Pond	Richland	C	3 ft	-	51
12	Moon Lake	Barnes	C	4.4 ft	-	54
13	Powers Lake	Mountrail	C	5.6 ft	-	52
14	Kulm-Edgeley Dam Lake	LaMoure	C	9 ft	-	51
15	Lake Metigoshe	Bottineau	C	5.4 ft	-	53
16	Short Creek Dam Lake	Burke	C	3.8 ft	-	55
17	Lake Tschida	Grant	C	5.1 ft	-	52
18	Lake Lamoure	LaMoure	C	8 ft	-	53
19	Lake Tschida	Grant	C	5.2 ft	-	51
20	Buffalo Lodge Lake	McHenry	C	3 ft	-	51
21	East Arroda Lake	Oliver	C	5.6 ft	-	50
22	Belfield Dam Lake	Stark	C	3.8 ft	-	52
23	Kalina Dam Lake	Bowman	C	3.1 ft	-	53
24	Beaver Lake	Logan	C	1.4 ft	-	59
25	Harvey Dam Lake	Wells	C	5.4 ft	-	51
26	Custer Mine Pond	McLean	C	2.2 ft	-	54
27	Bader Lake	Stutsman	C	1.3 ft	-	58
28	White Earth Dam Lake	Mountrail	C	3 ft	-	52
29	Trenton Lake	Williams	C	1.5 ft	-	58
30	Clearwater Lake	Mountrail	C	2.1 ft	-	55
31	Hiddenwood Lake	Ward	C	3.1 ft	-	54
32	Cherry Lake	Kidder	C	2.2 ft	-	54
33	Frettum Dam Lake	Kidder	C	2.6 ft	-	54
34	Renwick Dam Lake	Pembina	C	3 ft	-	52
35	Clausen Springs Lake	Barnes	C	-	-	55
36	Epping-Springbrook Dam-S Inlet Lake	Williams	C	-	-	59
37	Devils Lake	Ramsey	C	5.2 ft	-	56
38	Devils Lake	Benson	C	3.7 ft	-	57
39	Silver Lake	Sargent	C	5.9 ft	-	53
40	South Golden Lake	Steele	C	6.2 ft	-	53
41	Balta Dam Lake	Pierce	C	5.2 ft	-	56
42	Alkali Lake	Sargent	C	4.6 ft	-	55
43	North Golden Lake	Steele	C	3.8 ft	-	59
44	East Devils Lake	Ramsey	C	6.6 ft	-	54
45	Powers Lake Dredge Site	Mountrail	C	3.9 ft	-	55
46	Lake Tschida	Grant	C	2.4 ft	-	59
47	Lake Tschida	Grant	C	3.6 ft	-	57
48	Lake Darling	Renville	C	5.4 ft	-	53
49	Lake George	McHenry	C	2.5 ft	-	57
50	Hehn-Schaffer Lake	Stutsman	C	6.6 ft	-	54
51	Harmony Lake	Mercer	C	2.3 ft	-	58
52	Larson Lake	Hettinger	C	4.8 ft	-	55
53	Indian Creek Dam Lake	Hettinger	C	3.1 ft	-	56
54	Bowman-Haley Dam Lake	Bowman	C	3.9 ft	-	57
55	Mcleod Reservoir	Williams	C	5.4 ft	-	55
56	Lake Darling	Ward	D	5.8 ft	-	65
57	E. A. Patterson Lake	Stark	D	5.3 ft	-	65
58	Jamestown Reservoir	Stutsman	D	6 ft	-	69
59	Larimore Dam Lake	Grand Forks	D	3 ft	-	59
60	West Stump Lake	Nelson	D	9.8 ft	-	55
61	Pelican Lake	Ramsey	D	3.7 ft	-	59
62	Mcdowell Dam Lake	Burleigh	D	1.6 ft	-	62
63	East Stump Lake	Nelson	D	8.5 ft	-	60
64	Belourt Outlet Lake	Rolette	D	3 ft	-	58
65	Barnes Lake	Stutsman	D	6.4 ft	-	56
66	Belcourt Center Lake	Rolette	D	3 ft	-	58
67	Belcourt Inlet Lake	Rolette	D	3.3 ft	-	57
68	Epping-Springbrook Dam-Deepest Lake	Williams	D	4.9 ft	-	57
69	Castle Rock Dam Lake	Hettinger	D	3.8 ft	-	60
70	Gascoyne Lake	Bowman	D	1.3 ft	-	65
71	Sheep Creek Dam Lake	Grant	D	2.7 ft	-	60
72	Stanley Reservoir	Mountrail	D	1.1 ft	-	68
73	Green Lake	McIntosh	D	4.9 ft	-	54
74	Gravel Lake	Rolette	D	6.1 ft	-	51
75	Tolna Dam Lake	Nelson	D	4.9 ft	-	54
76	Lake Alice	Ramsey	D	3.1 ft	-	70
77	Lake Irvine	Ramsey	D	2.9 ft	-	69
78	Lake Laretta	Nelson	D	3.8 ft	-	68
79	Brewer Lake	Cass	D	4.3 ft	-	60
80	Antelope Lake	Pierce	D	3.5 ft	-	63
81	Warsing Dam Lake	Eddy	D	2.3 ft	-	64
82	Nygren Dam Lake	Morton	D	2.6 ft	-	63
83	Nelson Lake	Oliver	D	1.3 ft	-	67
84	Froelich Dam Lake	Sioux	D	3.9 ft	-	62
85	Odland Dam Lake	Golden Valley	D	1.5 ft	-	68
86	Tioga Dam Lake	Williams	D	2.2 ft	-	63
87	Western Stump Lake	Nelson	F	4.3 ft	-	66
88	Eastern Stump Lake	Nelson	F	4.7 ft	-	66
89	Sprague Lake	Sargent	F	1.6 ft	-	69
90	Dead Colt Creek Dam Lake	Ransom	F	3.3 ft	-	62
91	Sweetbriar Dam Lake	Morton	F	3 ft	-	66
92	Sweet Briar Dam-Mid Reservoir	Morton	F	3 ft	-	64
93	Mirror Lake	Adams	F	2.1 ft	-	65
94	Kolding Dam Lake	Grand Forks	F	1.7 ft	-	70
95	Harmon Lake	Morton	F	-	-	69

All eutrophic lakes →Minnesota version →Wisconsin version →Illinois version →Michigan version →Iowa version →Ohio version →Pennsylvania version →New York version →Missouri version →Indiana version →South Dakota version →All North Dakota lakes →

Source: EPA National Aquatic Resource Surveys, 2026.