Hennepin County Lake Quality

Minnesota, 98 lakes, average grade D (Nutrient-rich)

Hennepin County has 98 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. On average, Hennepin County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.

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 Sweeney-Twin Lake (A); the most-stressed is Mud Lake (F).

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Quick Answers for Hennepin County

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

Planning a trip? Check special fishing regulations for Sweeney-Twin Lake — or browse the full Minnesota regulations index.

Fishing in Hennepin County

Hennepin County Fishing Guide

Fish species and best-graded lakes in Hennepin County

DNR Reports (40)

Minnesota DNR LakeFinder resources for lakes in Hennepin 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 — Wirth
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Winterhalter
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Whaletail
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Weaver
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Twin
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Tanager
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Taft
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Sweeney
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Staring
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Spurzem
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Snelling
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Schandell
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Schmidt
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Ryan
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Round
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Riley
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Rice
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Red Rock
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Rebecca
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Powderhorn
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Pomerleau
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Parkers
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Nokomis
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Mitchell
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Minnetonka
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 — Lost
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Loring
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 — Dutch
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Langdon
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Lake of the Isles
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Independence
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Idlewild
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Hyland
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Hiawatha
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Harriet
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Half Moon
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Boundary Creek Pond
Fisheries Lake Survey · MN DNR LakeFinder
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Fisheries Lake Survey — Forest
Fisheries Lake Survey · MN DNR LakeFinder

All Lakes in Hennepin County

98 lakes · 81 graded, 17 not rated81 graded lakes · 17 not rated, hidden

Include not-rated lakes (17)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	ASweeney-Twin LakeHennepin	A	7.5 ft	22 µg/L	4.8 µg/L	No recent samples	No recent samples	Carry-in
2	APomerleau LakeHennepin	A	10.3 ft	20.5 µg/L	3.9 µg/L	No recent samples	26 ft	Carry-in
3	ASweeney LakeHennepin	A	6.9 ft	23 µg/L	5.6 µg/L	No recent samples	28 ft	Carry-in
4	ARiley LakeHennepin	A	11.5 ft	24 µg/L	6.5 µg/L	No recent samples	49 ft	✓ Public
5	ALost LakeHennepin	A	3.2 ft	86 µg/L	5.8 µg/L	No recent samples	6 ft	✓ Public
6	ABush LakeHennepin	A	13 ft	13.5 µg/L	2.6 µg/L	No recent samples	28 ft	✓ Public
7	CMinnetonka LakeHennepin	C	10 ft	28 µg/L	10.1 µg/L	No recent samples	113 ft	✓ Public
8	CRound LakeHennepin	C	6.6 ft	39 µg/L	14 µg/L	No recent samples	37 ft	✓ Public
9	CBryant LakeHennepin	C	9.8 ft	37.4 µg/L	4.9 µg/L	No recent samples	45 ft	✓ Public
10	CFish LakeHennepin	C	8.2 ft	29.4 µg/L	6.1 µg/L	No recent samples	49 ft	✓ Public
11	CCamelot LakeHennepin	C	1.3 ft	75.2 µg/L	6.1 µg/L	No recent samples	31 ft	Carry-in
12	CBde Maka Ska LakeHennepin	C	9.8 ft	88.5 µg/L	5.6 µg/L	No recent samples	82 ft	✓ Public
13	CHarriet LakeHennepin	C	9.7 ft	189.5 µg/L	5.4 µg/L	No recent samples	87 ft	✓ Public
14	CIdlewild LakeHennepin	C	6.2 ft	36 µg/L	6.9 µg/L	No recent samples	9 ft	Carry-in
15	CHyland LakeHennepin	C	4.9 ft	37.3 µg/L	13.1 µg/L	No recent samples	12 ft	✓ Public
16	CDuck LakeHennepin	C	5.9 ft	30 µg/L	5.9 µg/L	No recent samples	No recent samples	Carry-in
17	CLittle Long LakeHennepin	C	18.7 ft	27.5 µg/L	4.8 µg/L	No recent samples	45 ft	✓ Public
18	CWirth LakeHennepin	C	10.1 ft	34 µg/L	5.8 µg/L	No recent samples	25 ft	✓ Public
19	CMeadow LakeHennepin	C	3.9 ft	78.5 µg/L	6.2 µg/L	No recent samples	No recent samples	Carry-in
20	CParkers LakeHennepin	C	7 ft	52.6 µg/L	6 µg/L	No recent samples	37 ft	✓ Public
21	CChamplin Mill PondHennepin	C	4.9 ft	184.6 µg/L	6 µg/L	No recent samples	11 ft	✓ Public
22	CWestwood LakeHennepin	C	5.6 ft	28.5 µg/L	7.4 µg/L	No recent samples	No recent samples	Carry-in
23	CMinnetoga LakeHennepin	C	4.4 ft	36.5 µg/L	9.7 µg/L	No recent samples	27 ft	Carry-in
24	CSmetana LakeHennepin	C	6.6 ft	34 µg/L	5.9 µg/L	No recent samples	12 ft	Carry-in
25	DMud LakeHennepin	D	3 ft	196 µg/L	8.5 µg/L	No recent samples	No recent samples	Carry-in
26	DUnnamed LakeHennepin	D	3.3 ft	58 µg/L	17 µg/L	No recent samples	No recent samples	✓ Public
27	DMedicine LakeHennepin	D	7.9 ft	73.9 µg/L	9.6 µg/L	No recent samples	49 ft	✓ Public
28	DTwin LakeHennepin	D	5.9 ft	80.5 µg/L	23.4 µg/L	No recent samples	44 ft	✓ Public
29	DWhaletail LakeHennepin	D	3.3 ft	45.8 µg/L	19.4 µg/L	No recent samples	22 ft	✓ Public
30	DCedar LakeHennepin	D	4.8 ft	84.5 µg/L	12.4 µg/L	No recent samples	51 ft	Carry-in
31	DMitchell LakeHennepin	D	3 ft	68 µg/L	26.9 µg/L	No recent samples	19 ft	✓ Public
32	DSilver LakeHennepin	D	5.2 ft	61 µg/L	24.9 µg/L	No recent samples	No recent samples	✓ Public
33	DRice Marsh LakeHennepin	D	7.7 ft	44 µg/L	8 µg/L	No recent samples	No recent samples	Carry-in
34	DMccoy LakeHennepin	D	2.1 ft	95 µg/L	8 µg/L	No recent samples	No recent samples	✓ Public
35	DDiamond LakeHennepin	D	No recent samples	85.5 µg/L	12 µg/L	No recent samples	5.8 ft	Carry-in
36	DIndependence LakeHennepin	D	4.8 ft	68.8 µg/L	18.6 µg/L	No recent samples	58 ft	✓ Public
37	DRed Rock LakeHennepin	D	2.6 ft	75 µg/L	28.5 µg/L	No recent samples	16 ft	✓ Public
38	DRebecca LakeHennepin	D	4.7 ft	47.4 µg/L	15.5 µg/L	No recent samples	30 ft	✓ Public
39	DHiawatha LakeHennepin	D	3.3 ft	67 µg/L	22.5 µg/L	No recent samples	33 ft	Carry-in
40	DNokomis LakeHennepin	D	4 ft	58 µg/L	25.9 µg/L	No recent samples	33 ft	✓ Public
41	DEast Sarah LakeHennepin	D	3.5 ft	128.5 µg/L	No recent samples	No recent samples	59 ft	✓ Public
42	DSpurzem LakeHennepin	D	3.3 ft	95.8 µg/L	24.8 µg/L	No recent samples	38 ft	✓ Public
43	DLake of the IslesHennepin	D	5.2 ft	53 µg/L	12.9 µg/L	No recent samples	31 ft	Carry-in
44	DWeaver LakeHennepin	D	5 ft	38.7 µg/L	10.6 µg/L	No recent samples	57 ft	✓ Public
45	DSchmidt LakeHennepin	D	5.5 ft	60.6 µg/L	14.2 µg/L	No recent samples	25 ft	Carry-in
46	DFrench LakeHennepin	D	3 ft	50.2 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
47	DBrownie LakeHennepin	D	5 ft	44 µg/L	17.7 µg/L	No recent samples	47 ft	Carry-in
48	DPeter LakeHennepin	D	9.1 ft	72.2 µg/L	8.2 µg/L	No recent samples	No recent samples	Carry-in
49	DForest LakeHennepin	D	3.7 ft	48.5 µg/L	23.7 µg/L	No recent samples	42 ft	✓ Public
50	DGrass LakeHennepin	D	No recent samples	112 µg/L	20.3 µg/L	No recent samples	No recent samples	Carry-in
51	DMagda LakeHennepin	D	14.1 ft	59 µg/L	12.7 µg/L	No recent samples	No recent samples	✓ Public
52	DSchwappauf LakeHennepin	D	4.4 ft	65.1 µg/L	12.7 µg/L	No recent samples	29 ft	✓ Public
53	DPenn LakeHennepin	D	2 ft	55 µg/L	14.5 µg/L	No recent samples	7 ft	✓ Public
54	DHannan LakeHennepin	D	4.3 ft	52.5 µg/L	11 µg/L	No recent samples	No recent samples	Carry-in
55	DWolfe Park LakeHennepin	D	5.9 ft	59.5 µg/L	7.9 µg/L	No recent samples	25 ft	Carry-in
56	FMud LakeHennepin	F	0.9 ft	150 µg/L	123.5 µg/L	No recent samples	No recent samples	Carry-in
57	FSnelling LakeHennepin	F	1.8 ft	143 µg/L	52 µg/L	No recent samples	9.5 ft	✓ Public
58	FLong LakeHennepin	F	3.3 ft	62 µg/L	32 µg/L	No recent samples	33 ft	✓ Public
59	FUnnamed LakeHennepin	F	No recent samples	220.5 µg/L	82 µg/L	No recent samples	No recent samples	Carry-in
60	FEagle LakeHennepin	F	3 ft	58 µg/L	32.5 µg/L	No recent samples	34 ft	✓ Public
61	FBass LakeHennepin	F	4 ft	34 µg/L	33.2 µg/L	No recent samples	31 ft	Carry-in
62	FRice LakeHennepin	F	2.3 ft	333.8 µg/L	117.9 µg/L	No recent samples	11.5 ft	Carry-in
63	FGoose LakeHennepin	F	0.8 ft	132.1 µg/L	96.5 µg/L	No recent samples	8 ft	Carry-in
64	FPowderhorn LakeHennepin	F	1.5 ft	150 µg/L	47.3 µg/L	No recent samples	24 ft	Carry-in
65	FCrystal LakeHennepin	F	3.5 ft	58 µg/L	34.9 µg/L	No recent samples	39 ft	✓ Public
66	FDiamond LakeHennepin	F	1.7 ft	162.2 µg/L	66.5 µg/L	No recent samples	8 ft	✓ Public
67	FArdmore LakeHennepin	F	1.3 ft	285 µg/L	130 µg/L	No recent samples	20 ft	✓ Public
68	FThomas LakeHennepin	F	3.4 ft	78.3 µg/L	34.1 µg/L	No recent samples	No recent samples	Carry-in
69	FVictoria LakeHennepin	F	1.2 ft	78 µg/L	52.5 µg/L	No recent samples	No recent samples	Carry-in
70	FLoring LakeHennepin	F	2.9 ft	77 µg/L	31.9 µg/L	No recent samples	16 ft	✓ Public
71	FCedar Island LakeHennepin	F	3 ft	93 µg/L	41.8 µg/L	No recent samples	No recent samples	Carry-in
72	FHalf Moon LakeHennepin	F	4.2 ft	109.1 µg/L	35.6 µg/L	No recent samples	25 ft	Carry-in
73	FSarah LakeHennepin	F	3.1 ft	106.1 µg/L	34.3 µg/L	No recent samples	59 ft	✓ Public
74	FSylvan LakeHennepin	F	1.2 ft	296.6 µg/L	84.6 µg/L	No recent samples	No recent samples	Carry-in
75	FSpring LakeHennepin	F	3.4 ft	434 µg/L	99.1 µg/L	No recent samples	No recent samples	Carry-in
76	FTanager LakeHennepin	F	2.3 ft	82 µg/L	54.6 µg/L	No recent samples	23 ft	Carry-in
77	FStaring LakeHennepin	F	2.6 ft	72 µg/L	45.4 µg/L	No recent samples	16 ft	✓ Public
78	FWinterhalter LakeHennepin	F	3.9 ft	121.4 µg/L	50.3 µg/L	No recent samples	27 ft	Carry-in
79	FNorthwood LakeHennepin	F	1.5 ft	194 µg/L	74 µg/L	No recent samples	No recent samples	Carry-in
80	FCowley LakeHennepin	F	0.8 ft	738.6 µg/L	343.5 µg/L	No recent samples	No recent samples	Carry-in
81	FLamplighter Park LakeHennepin	F	1.1 ft	121.5 µg/L	107.5 µg/L	No recent samples	No recent samples	Carry-in
	NROx Yoke LakeHennepin	NR	2.6 ft	396 µg/L	9.2 µg/L	No recent samples	No recent samples	Carry-in
	NRNormandale LakeHennepin	NR	3.7 ft	84 µg/L	16.2 µg/L	No recent samples	No recent samples	✓ Public
	NRHadley LakeHennepin	NR	8 ft	No recent samples	No recent samples	No recent samples	No recent samples	Carry-in
	NRLangdon LakeHennepin	NR	1.5 ft	No recent samples	No recent samples	No recent samples	38 ft	✓ Public
	NRAnderson LakeHennepin	NR	5 ft	No recent samples	No recent samples	No recent samples	9 ft	Carry-in
	NRMirror LakeHennepin	NR	3.9 ft	No recent samples	No recent samples	No recent samples	No recent samples	Carry-in
	NRRyan LakeHennepin	NR	No recent samples	No recent samples	No recent samples	No recent samples	36 ft	✓ Public
	NRRice LakeHennepin	NR	2.6 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRUnn LakeHennepin	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Carry-in
	NRRice LakeHennepin	NR	2.3 ft	No recent samples	No recent samples	No recent samples	11.5 ft	Carry-in
	NRPamela PondHennepin	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Carry-in
	NRTaft LakeHennepin	NR	No recent samples	No recent samples	No recent samples	No recent samples	45 ft	Carry-in
	NRLong Meadow LakeHennepin	NR	1.6 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRGleason LakeHennepin	NR	1.7 ft	No recent samples	No recent samples	No recent samples	No recent samples	Carry-in
	NRDutch LakeHennepin	NR	4 ft	No recent samples	No recent samples	No recent samples	45 ft	✓ Public
	NRShaver LakeHennepin	NR	4 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRSnyder LakeHennepin	NR	No recent samples	190 µg/L	164 µg/L	No recent samples	No recent samples	✓ Public

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

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 Hennepin 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.