Beltrami County Lake Quality

Minnesota, 95 lakes, average grade B (Good)

Beltrami County has 95 graded lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the grade distribution reflects that mix. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Big Lake (A); the most-stressed is Moose Lake (D).

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Quick Answers for Beltrami County

Cleanest lakes in Beltrami County →Cleanest lakes in Minnesota →Safest swimming lakes in Minnesota →

Planning a trip? Check special fishing regulations for Big Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Minnesota regulations index.

Fishing in Beltrami County

Beltrami County Fishing Guide

Fish species and best-graded lakes in Beltrami County

DNR Reports (40)

Minnesota DNR LakeFinder resources for lakes in Beltrami County. browse all reports →

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

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Fisheries Lake Survey — Wolf
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Red (Upper Red)
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Turtle River
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Turtle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Three Island
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Swenson
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Stump
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — South Twin
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Silver
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Sylvia
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Rabideau
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Pimushe
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — North Twin
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Movil
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Moose
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Moose
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Medicine
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Marquette
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Long
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Little Turtle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Little Bass
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Kitchi
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Julia
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Irving
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Gull
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Grant
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Grace
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Gilstad
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Fox
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Cass
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Deer
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Campbell
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Buzzle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Buck
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Blackduck
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Black
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Big
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Big Bass (east basin)
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Bemidji (main lake)
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Beltrami
Fisheries Lake Survey · MN DNR LakeFinder

All Lakes in Beltrami County

95 lakes · 85 graded, 10 not rated85 graded lakes · 10 not rated, hidden

Include not-rated lakes (10)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	ABig LakeBeltrami	A	9.7 ft	15 µg/L	4.8 µg/L	No recent samples	35 ft	✓ Public
2	AFullers Lake: East BasinBeltrami	A	15 ft	10 µg/L	2.4 µg/L	No recent samples	No recent samples	Not recorded
3	ARound LakeBeltrami	A	18 ft	7 µg/L	1.9 µg/L	No recent samples	38 ft	Carry-in
4	AWhitefish LakeBeltrami	A	12.5 ft	14 µg/L	3.7 µg/L	No recent samples	30 ft	✓ Public
5	ALong LakeBeltrami	A	20 ft	7 µg/L	1.8 µg/L	No recent samples	87 ft	Carry-in
6	ALong LakeBeltrami	A	10 ft	17 µg/L	4.9 µg/L	No recent samples	83 ft	✓ Public
7	ALong LakeBeltrami	A	14 ft	8 µg/L	1.9 µg/L	No recent samples	No recent samples	Not recorded
8	ADeer LakeBeltrami	A	11 ft	15 µg/L	4.3 µg/L	No recent samples	42 ft	✓ Public
9	ASchram LakeBeltrami	A	3.9 ft	21 µg/L	6.2 µg/L	No recent samples	No recent samples	✓ Public
10	AEmerald LakeBeltrami	A	9.5 ft	12 µg/L	3.2 µg/L	No recent samples	No recent samples	Not recorded
11	AShell LakeBeltrami	A	13 ft	10.5 µg/L	2.6 µg/L	No recent samples	No recent samples	Not recorded
12	AAndrusia LakeBeltrami	A	15.1 ft	14.5 µg/L	3.6 µg/L	No recent samples	60 ft	✓ Public
13	AGreen LakeBeltrami	A	18.5 ft	7 µg/L	1.6 µg/L	No recent samples	No recent samples	Not recorded
14	AGreen LakeBeltrami	A	12 ft	10 µg/L	3.3 µg/L	No recent samples	No recent samples	Not recorded
15	AIsland LakeBeltrami	A	16 ft	10 µg/L	2.4 µg/L	No recent samples	No recent samples	Not recorded
16	AMoose LakeBeltrami	A	15.1 ft	11 µg/L	2.2 µg/L	No recent samples	71 ft	✓ Public
17	ATurtle LakeBeltrami	A	10.2 ft	15 µg/L	4.9 µg/L	No recent samples	45 ft	✓ Public
18	ASandy LakeBeltrami	A	16 ft	8 µg/L	2.7 µg/L	No recent samples	No recent samples	Not recorded
19	ASandy LakeBeltrami	A	14 ft	18 µg/L	1.6 µg/L	No recent samples	32 ft	✓ Public
20	AHeart LakeBeltrami	A	14.5 ft	10 µg/L	2.7 µg/L	No recent samples	No recent samples	Not recorded
21	ANorth Twin LakeBeltrami	A	17.4 ft	8 µg/L	1.9 µg/L	No recent samples	59 ft	✓ Public
22	ALittle Big LakeBeltrami	A	9.3 ft	13.5 µg/L	2.8 µg/L	No recent samples	35 ft	✓ Public
23	AJessie LakeBeltrami	A	4.6 ft	23.5 µg/L	4.6 µg/L	No recent samples	35 ft	✓ Public
24	ALittle Bass LakeBeltrami	A	16 ft	10 µg/L	2.5 µg/L	No recent samples	22 ft	Carry-in
25	ABemidji LakeBeltrami	A	12.5 ft	16.5 µg/L	4 µg/L	No recent samples	76 ft	✓ Public
26	ABalm LakeBeltrami	A	11.5 ft	17.5 µg/L	2.9 µg/L	No recent samples	33 ft	✓ Public
27	AWolf LakeBeltrami	A	9 ft	19 µg/L	5.3 µg/L	No recent samples	57 ft	✓ Public
28	AStump LakeBeltrami	A	13 ft	19.5 µg/L	3 µg/L	No recent samples	24 ft	✓ Public
29	AThree Island LakeBeltrami	A	11.8 ft	17 µg/L	4.1 µg/L	No recent samples	25 ft	✓ Public
30	ABeltrami LakeBeltrami	A	11.2 ft	15 µg/L	4.3 µg/L	No recent samples	50 ft	✓ Public
31	AJulia LakeBeltrami	A	9.2 ft	21 µg/L	4.5 µg/L	No recent samples	43 ft	✓ Public
32	ABuck LakeBeltrami	A	12 ft	15 µg/L	4.3 µg/L	No recent samples	40 ft	Carry-in
33	AFox LakeBeltrami	A	11.2 ft	13 µg/L	4 µg/L	No recent samples	19 ft	Carry-in
34	ABig Bass LakeBeltrami	A	10.5 ft	14 µg/L	5.1 µg/L	No recent samples	17 ft	✓ Public
35	AMovil LakeBeltrami	A	14 ft	12 µg/L	5.3 µg/L	No recent samples	50 ft	✓ Public
36	AGrant LakeBeltrami	A	10.7 ft	11.5 µg/L	3.6 µg/L	No recent samples	92 ft	✓ Public
37	ANo-Name LakeBeltrami	A	13 ft	11 µg/L	3.2 µg/L	No recent samples	No recent samples	Not recorded
38	AJohnson LakeBeltrami	A	7.5 ft	23.5 µg/L	6.4 µg/L	No recent samples	No recent samples	Not recorded
39	AShemahgun LakeBeltrami	A	15 ft	8.5 µg/L	1.6 µg/L	No recent samples	No recent samples	Not recorded
40	AKinney LakeBeltrami	A	15 ft	8 µg/L	2.4 µg/L	No recent samples	No recent samples	Not recorded
41	ALindgren LakeBeltrami	A	13 ft	14 µg/L	4 µg/L	No recent samples	No recent samples	Carry-in
42	ASwenson LakeBeltrami	A	20.7 ft	8 µg/L	2 µg/L	No recent samples	76 ft	Carry-in
43	ASquaw Smith LakeBeltrami	A	20 ft	9.5 µg/L	1.6 µg/L	No recent samples	No recent samples	Not recorded
44	AFullers Lake: West BasinBeltrami	A	13 ft	12.5 µg/L	3.3 µg/L	No recent samples	No recent samples	Not recorded
45	ADickens LakeBeltrami	A	11 ft	15 µg/L	4 µg/L	No recent samples	No recent samples	✓ Public
46	ABlack LakeBeltrami	A	10.3 ft	24 µg/L	4.7 µg/L	No recent samples	42 ft	✓ Public
47	AChain: Middle LakeBeltrami	A	11.3 ft	14 µg/L	3.7 µg/L	No recent samples	No recent samples	Not recorded
48	ASouth Twin LakeBeltrami	A	16.7 ft	8.5 µg/L	2.2 µg/L	No recent samples	45 ft	✓ Public
49	ABig Thunder LakeBeltrami	A	11.5 ft	12 µg/L	3.7 µg/L	No recent samples	No recent samples	Not recorded
50	ABass Lake: Southeast BasinBeltrami	A	9 ft	12.5 µg/L	3.6 µg/L	No recent samples	No recent samples	Not recorded
51	AChain: South LakeBeltrami	A	11 ft	14 µg/L	5.6 µg/L	No recent samples	No recent samples	Not recorded
52	ALittle Thunder LakeBeltrami	A	15 ft	12 µg/L	2.8 µg/L	No recent samples	No recent samples	Not recorded
53	ABass Lake: Northwest BasinBeltrami	A	11 ft	11.5 µg/L	4 µg/L	No recent samples	No recent samples	Not recorded
54	APimushe LakeBeltrami	A	8.2 ft	22 µg/L	6.2 µg/L	No recent samples	40 ft	✓ Public
55	ABullhead LakeBeltrami	A	7.5 ft	22 µg/L	3.1 µg/L	No recent samples	40 ft	Carry-in
56	ABuzzle LakeBeltrami	A	17.1 ft	8.5 µg/L	1.5 µg/L	No recent samples	83 ft	✓ Public
57	ACass Lake Allens BayBeltrami	A	16.6 ft	18.5 µg/L	4.7 µg/L	No recent samples	120 ft	✓ Public
58	APug Hole LakeBeltrami	A	10.7 ft	22 µg/L	6.2 µg/L	No recent samples	No recent samples	Carry-in
59	ACass LakeBeltrami	A	18.5 ft	11 µg/L	3.2 µg/L	No recent samples	120 ft	✓ Public
60	BMedicine LakeBeltrami	B	7.9 ft	23 µg/L	7.1 µg/L	No recent samples	44 ft	✓ Public
61	BLittle Rice LakeBeltrami	B	7.5 ft	21 µg/L	7.4 µg/L	No recent samples	26 ft	Carry-in
62	CIrving LakeBeltrami	C	5.6 ft	32 µg/L	10.2 µg/L	No recent samples	19 ft	✓ Public
63	CGrace LakeBeltrami	C	15 ft	21.5 µg/L	9.3 µg/L	No recent samples	42 ft	✓ Public
64	CSandy LakeBeltrami	C	10.7 ft	32.5 µg/L	1.2 µg/L	No recent samples	72 ft	✓ Public
65	CGull LakeBeltrami	C	7.9 ft	26 µg/L	6.3 µg/L	No recent samples	23 ft	✓ Public
66	CUpper Red Lake: West-CentralBeltrami	C	2 ft	41.5 µg/L	13.4 µg/L	No recent samples	15 ft	Carry-in
67	CLower Red Lake : East CentralBeltrami	C	4 ft	36 µg/L	11.1 µg/L	No recent samples	No recent samples	Not recorded
68	CLittle Turtle LakeBeltrami	C	6.5 ft	23.5 µg/L	12 µg/L	No recent samples	25 ft	Carry-in
69	CBlackduck LakeBeltrami	C	6.2 ft	34 µg/L	12.3 µg/L	No recent samples	28 ft	✓ Public
70	CTurtle River LakeBeltrami	C	8.5 ft	18.5 µg/L	7.5 µg/L	No recent samples	63 ft	✓ Public
71	CUpper Red Lake: East CentralBeltrami	C	2 ft	39 µg/L	13.4 µg/L	No recent samples	15 ft	Carry-in
72	CCampbell LakeBeltrami	C	6.7 ft	21.5 µg/L	8.4 µg/L	No recent samples	25 ft	✓ Public
73	CMarquette LakeBeltrami	C	9.2 ft	24 µg/L	8.9 µg/L	No recent samples	51 ft	Carry-in
74	CLower Red Lake: West CentralBeltrami	C	4 ft	34 µg/L	11.6 µg/L	No recent samples	No recent samples	Not recorded
75	CKitchi LakeBeltrami	C	8.2 ft	23 µg/L	7.5 µg/L	No recent samples	50 ft	Carry-in
76	CDrewery LakeBeltrami	C	3.5 ft	11.5 µg/L	2.7 µg/L	No recent samples	120 ft	✓ Public
77	CBig Rice LakeBeltrami	C	5.7 ft	26 µg/L	11.4 µg/L	No recent samples	13 ft	✓ Public
78	CKitchi West Arm LakeBeltrami	C	10.2 ft	22.5 µg/L	7.7 µg/L	No recent samples	50 ft	Carry-in
79	DMoose LakeBeltrami	D	3.8 ft	58.5 µg/L	28.5 µg/L	No recent samples	13 ft	✓ Public
80	DLower Red Lake : EastBeltrami	D	4 ft	33 µg/L	12.3 µg/L	No recent samples	No recent samples	Not recorded
81	DUpper Red Lake: EastBeltrami	D	2 ft	37 µg/L	13 µg/L	No recent samples	15 ft	Carry-in
82	DLower Red Lake : CentralBeltrami	D	4 ft	36 µg/L	11 µg/L	No recent samples	No recent samples	Not recorded
83	DUpper Red Lake: WestBeltrami	D	2 ft	41 µg/L	16 µg/L	No recent samples	15 ft	Carry-in
84	DLower Red Lake : WestBeltrami	D	4 ft	35 µg/L	11.6 µg/L	No recent samples	No recent samples	Not recorded
85	DUpper Red Lake: CentralBeltrami	D	2 ft	41 µg/L	13.2 µg/L	No recent samples	15 ft	Carry-in
	NRRush LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHead LakeBeltrami	NR	5.1 ft	5 µg/L	8.3 µg/L	No recent samples	No recent samples	Not recorded
	NRRabideau LakeBeltrami	NR	9 ft	No recent samples	No recent samples	No recent samples	112 ft	✓ Public
	NRGilstad LakeBeltrami	NR	6.2 ft	No recent samples	No recent samples	No recent samples	55 ft	✓ Public
	NRGwin LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGrass Island LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRFairbanks LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRKesagiagan LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDune LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLaxon LakeBeltrami	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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Other Counties in Minnesota

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2 lakes · Avg grade A

Morrison County

16 lakes · Avg grade A

Hubbard County

76 lakes · Avg grade A

Cass County

130 lakes · Avg grade A

Cook County

139 lakes · Avg grade A

Crow Wing County

121 lakes · Avg grade A

See how Beltrami County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.

Source: EPA National Aquatic Resource Surveys, 2026.