Hubbard County Lake Quality

Minnesota, 76 lakes, average grade A (Excellent)

Hubbard County in Minnesota carries 76 graded lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. The county's average grade is A — among the cleanest in Minnesota. 54 lakes pull an A on their own, and almost none fall into the D or F brackets.

Many of the county's lakes are deep glacial basins — over 50 feet at their deepest point — which gives them thermal stratification and a buffer against summer warming. Long Lake (grade A) is the cleanest in the county.

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Quick Answers for Hubbard County

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

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

Fishing in Hubbard County

Hubbard County Fishing Guide

Fish species and best-graded lakes in Hubbard County

DNR Reports (40)

Minnesota DNR LakeFinder resources for lakes in Hubbard 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 — Waboose
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Upper Twin
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Upper Bottle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Twenty-One
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Third Crow Wing
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Tenth Crow Wing
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Stocking
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Swamp
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Spider
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Spearhead
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Skunk
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Sixth Crow Wing
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Shallow
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Seventh Crow Wing
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Schoolcraft
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Potato
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Portage
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Plantagenet
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Pickerel
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Palmer
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Paine
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Owl
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Ojibway
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Ninth Crow Wing
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Nelson
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Mow
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Lord
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Midge
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Big LaSalle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Lower Bottle
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 Sand
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Little Mantrap
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — LaSalle
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Kabekona
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Island
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Island
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Hinds
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Hennepin
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Hattie
Fisheries Lake Survey · MN DNR LakeFinder

All Lakes in Hubbard County

76 lakes · 67 graded, 9 not rated67 graded lakes · 9 not rated, hidden

Include not-rated lakes (9)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	ALong LakeHubbard	A	11.2 ft	10 µg/L	4.5 µg/L	No recent samples	135 ft	✓ Public
2	ADead LakeHubbard	A	16 ft	10 µg/L	3.8 µg/L	No recent samples	34 ft	✓ Public
3	AShallow LakeHubbard	A	8.2 ft	10.5 µg/L	2.9 µg/L	No recent samples	10 ft	✓ Public
4	ADeer LakeHubbard	A	12.8 ft	13.5 µg/L	4.5 µg/L	No recent samples	9 ft	✓ Public
5	ABlue LakeHubbard	A	17.3 ft	8 µg/L	1.9 µg/L	No recent samples	84 ft	✓ Public
6	AEagle LakeHubbard	A	11.2 ft	14.5 µg/L	4.7 µg/L	No recent samples	77 ft	✓ Public
7	AMantrap LakeHubbard	A	12 ft	17 µg/L	4.5 µg/L	No recent samples	No recent samples	✓ Public
8	ABenedict LakeHubbard	A	11.5 ft	8.5 µg/L	2.4 µg/L	No recent samples	91 ft	✓ Public
9	AMow LakeHubbard	A	14.5 ft	9 µg/L	3.1 µg/L	No recent samples	34 ft	✓ Public
10	AIsland LakeHubbard	A	10.5 ft	17 µg/L	6.2 µg/L	No recent samples	65 ft	✓ Public
11	AIsland LakeHubbard	A	16.4 ft	10.5 µg/L	3.6 µg/L	No recent samples	32 ft	✓ Public
12	ACrooked LakeHubbard	A	19 ft	8 µg/L	2.2 µg/L	No recent samples	No recent samples	✓ Public
13	ALower Bottle LakeHubbard	A	15 ft	10 µg/L	2.5 µg/L	No recent samples	110 ft	Carry-in
14	APickerel LakeHubbard	A	11.1 ft	14 µg/L	4.3 µg/L	No recent samples	26 ft	✓ Public
15	AGeorge LakeHubbard	A	12.6 ft	12 µg/L	3.6 µg/L	No recent samples	29 ft	✓ Public
16	AUpper Bottle LakeHubbard	A	16 ft	11 µg/L	3 µg/L	No recent samples	55 ft	✓ Public
17	ALittle Mantrap LakeHubbard	A	17 ft	8 µg/L	2.5 µg/L	No recent samples	54 ft	✓ Public
18	AEmma LakeHubbard	A	18.5 ft	11 µg/L	2.7 µg/L	No recent samples	50 ft	✓ Public
19	AAlice LakeHubbard	A	7.2 ft	21 µg/L	5.3 µg/L	No recent samples	21 ft	Carry-in
20	APotato LakeHubbard	A	11.5 ft	11 µg/L	3.9 µg/L	No recent samples	87 ft	✓ Public
21	ANinth Crow Wing LakeHubbard	A	10.2 ft	15.5 µg/L	5.8 µg/L	No recent samples	65 ft	✓ Public
22	APlantagenet LakeHubbard	A	7 ft	20 µg/L	6.7 µg/L	No recent samples	65 ft	✓ Public
23	ASkunk LakeHubbard	A	16.5 ft	11.5 µg/L	2.3 µg/L	No recent samples	55 ft	✓ Public
24	ASpider (Ne LakeHubbard	A	17.1 ft	11 µg/L	3.2 µg/L	No recent samples	96 ft	✓ Public
25	ADuck LakeHubbard	A	10.2 ft	15 µg/L	7 µg/L	No recent samples	23 ft	✓ Public
26	AGilmore LakeHubbard	A	20.3 ft	10 µg/L	1.5 µg/L	No recent samples	54 ft	Carry-in
27	AMidge LakeHubbard	A	18 ft	16 µg/L	2.5 µg/L	No recent samples	24 ft	✓ Public
28	AHam LakeHubbard	A	9.7 ft	15 µg/L	3.6 µg/L	No recent samples	22 ft	Carry-in
29	AStocking LakeHubbard	A	11.5 ft	22 µg/L	5.3 µg/L	No recent samples	25 ft	Carry-in
30	ABig Sand LakeHubbard	A	23 ft	7 µg/L	1.7 µg/L	No recent samples	135 ft	✓ Public
31	ALittle Sand LakeHubbard	A	20 ft	7 µg/L	1.8 µg/L	No recent samples	80 ft	✓ Public
32	ABig Bass LakeHubbard	A	19.4 ft	6 µg/L	1.9 µg/L	No recent samples	60 ft	✓ Public
33	AGarfield LakeHubbard	A	9.5 ft	19 µg/L	4.8 µg/L	No recent samples	32 ft	✓ Public
34	AHattie LakeHubbard	A	12.5 ft	17.5 µg/L	6.2 µg/L	No recent samples	39 ft	✓ Public
35	ABad Axe LakeHubbard	A	15.1 ft	15 µg/L	4 µg/L	No recent samples	39 ft	Carry-in
36	AMoran LakeHubbard	A	11.8 ft	15 µg/L	3.8 µg/L	No recent samples	32 ft	✓ Public
37	AKabekona LakeHubbard	A	12.1 ft	11 µg/L	2.6 µg/L	No recent samples	133 ft	✓ Public
38	ANelson LakeHubbard	A	14.5 ft	12 µg/L	2.3 µg/L	No recent samples	19.5 ft	✓ Public
39	AHinds LakeHubbard	A	13.5 ft	11 µg/L	4 µg/L	No recent samples	36 ft	✓ Public
40	AFish Hook LakeHubbard	A	10.2 ft	13 µg/L	4.5 µg/L	No recent samples	76 ft	✓ Public
41	AFourth Crow Wing LakeHubbard	A	8 ft	19.5 µg/L	2.2 µg/L	No recent samples	10 ft	✓ Public
42	APalmer LakeHubbard	A	9.5 ft	11 µg/L	4.4 µg/L	No recent samples	21 ft	✓ Public
43	ABoulder LakeHubbard	A	10.8 ft	16 µg/L	6.2 µg/L	No recent samples	28 ft	✓ Public
44	ABelle Taine LakeHubbard	A	22.8 ft	7 µg/L	2.2 µg/L	No recent samples	56 ft	✓ Public
45	ATenth Crow Wing LakeHubbard	A	10.5 ft	13.5 µg/L	4.5 µg/L	No recent samples	40 ft	✓ Public
46	ABig Stony LakeHubbard	A	9.8 ft	12 µg/L	4.5 µg/L	No recent samples	24 ft	✓ Public
47	AHalverson LakeHubbard	A	8.9 ft	19 µg/L	6.9 µg/L	No recent samples	32 ft	✓ Public
48	ATwenty-One LakeHubbard	A	17 ft	10.5 µg/L	3.6 µg/L	No recent samples	51.5 ft	✓ Public
49	AGillett LakeHubbard	A	19 ft	8.5 µg/L	2.4 µg/L	No recent samples	49 ft	Carry-in
50	AMccarty LakeHubbard	A	9 ft	12 µg/L	4.3 µg/L	No recent samples	No recent samples	✓ Public
51	ANewman LakeHubbard	A	17.1 ft	6 µg/L	1.8 µg/L	No recent samples	63 ft	✓ Public
52	AHennepin LakeHubbard	A	10 ft	15 µg/L	4.8 µg/L	No recent samples	14 ft	✓ Public
53	ALasalle LakeHubbard	A	6.9 ft	8.5 µg/L	7 µg/L	No recent samples	213 ft	✓ Public
54	APaine LakeHubbard	A	4.9 ft	13.5 µg/L	2.7 µg/L	No recent samples	6 ft	✓ Public
55	BThird Crow Wing LakeHubbard	B	2.5 ft	21 µg/L	7.4 µg/L	No recent samples	35 ft	✓ Public
56	BOjibway LakeHubbard	B	15.5 ft	12 µg/L	4.5 µg/L	No recent samples	22 ft	✓ Public
57	BWaboose LakeHubbard	B	16.8 ft	10 µg/L	6.1 µg/L	No recent samples	32 ft	✓ Public
58	BBig Wolf LakeHubbard	B	11.5 ft	21 µg/L	No recent samples	No recent samples	57 ft	✓ Public
59	CPortage LakeHubbard	C	5.5 ft	30.5 µg/L	11.2 µg/L	No recent samples	17 ft	✓ Public
60	CUpper Twin LakeHubbard	C	6.9 ft	25.5 µg/L	1.9 µg/L	No recent samples	12 ft	✓ Public
61	CFifth Crow Wing LakeHubbard	C	8.9 ft	21 µg/L	7.7 µg/L	No recent samples	35 ft	Carry-in
62	CSeventh Crow Wing LakeHubbard	C	6.9 ft	25 µg/L	7.6 µg/L	No recent samples	42 ft	Carry-in
63	CFirst Crow Wing LakeHubbard	C	5.9 ft	30 µg/L	10.9 µg/L	No recent samples	15 ft	Carry-in
64	CEighth Crow Wing LakeHubbard	C	5.7 ft	24 µg/L	13.8 µg/L	No recent samples	30 ft	✓ Public
65	CSixth Crow Wing LakeHubbard	C	8.9 ft	21 µg/L	10.7 µg/L	No recent samples	40 ft	✓ Public
66	CSchoolcraft LakeHubbard	C	8.9 ft	29.5 µg/L	9.6 µg/L	No recent samples	37 ft	✓ Public
67	DHart LakeHubbard	D	4.5 ft	45.5 µg/L	9.8 µg/L	No recent samples	13 ft	✓ Public
	NRSpearhead LakeHubbard	NR	15 ft	No recent samples	No recent samples	No recent samples	81 ft	Carry-in
	NRMary LakeHubbard	NR	18.8 ft	No recent samples	No recent samples	No recent samples	48 ft	✓ Public
	NROwl LakeHubbard	NR	14 ft	No recent samples	No recent samples	No recent samples	26 ft	Carry-in
	NRBeauty LakeHubbard	NR	21 ft	No recent samples	No recent samples	No recent samples	53 ft	✓ Public
	NRLost LakeHubbard	NR	8 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPeysenske LakeHubbard	NR	15 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRFrielund LakeHubbard	NR	9.5 ft	10 µg/L	3.7 µg/L	No recent samples	No recent samples	Not recorded
	NRPotato LakeHubbard	NR	No recent samples	No recent samples	No recent samples	No recent samples	76 ft	✓ Public
	NRSecond Crow Wing LakeHubbard	NR	11.3 ft	14 µg/L	6.4 µg/L	No recent samples	35 ft	Carry-in

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

Clay County

2 lakes · Avg grade A

Morrison County

16 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

Otter Tail County

98 lakes · Avg grade B

See how Hubbard 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.