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LakeGrade

Best Lake Counties in Minnesota & Wisconsin

All 144 counties ranked by average lake water quality grade. Counties with more A and B graded lakes rank higher.

RankCountyStateAvg GradeLakesAvg Score
1Menominee CountyWIA54.00
2Kewaunee CountyWIA44.00
3Vernon CountyWIA14.00
4Outagamie CountyWIA14.00
5Florence CountyWIA393.99
6Marinette CountyWIA223.93
7Waushara CountyWIA303.88
8Waupaca CountyWIA273.85
9Iron CountyWIA343.81
10Washburn CountyWIA483.79
11Bayfield CountyWIA553.77
12Vilas CountyWIA2023.71
13Ashland CountyWIA103.70
14Oconto CountyWIA663.68
15Forest CountyWIA353.63
16Langlade CountyWIA323.61
17Burnett CountyWIA703.60
18Portage CountyWIA293.59
19Washington CountyWIA153.53
20Kenosha CountyWIA133.50
21Adams CountyWIA203.50
22Jackson CountyWIA43.50
23Sawyer CountyWIB523.49
24Waukesha CountyWIB483.48
25Oneida CountyWIB1403.47
26Lincoln CountyWIB213.38
27Hubbard CountyMNB773.36
28Cass CountyMNB1333.35
29Unknown CountyMNB63.33
30Sheboygan CountyWIB63.33
31Marquette CountyWIB143.32
32Shawano CountyWIB273.31
33Rusk CountyWIB133.31
34Chippewa CountyWIB163.25
35Crow Wing CountyMNB1203.24
36Brown CountyWIB33.22
37Clearwater CountyMNB403.18
38Door CountyWIB113.18
39Beltrami CountyMNB863.16
40Mille Lacs CountyMNB113.12
41Polk CountyWIB773.12
42Manitowoc CountyWIB183.06
43Walworth CountyWIB343.01
44Fond du Lac CountyWIB103.00
45Barron CountyWIB382.96
46Douglas CountyWIB402.96
47Otter Tail CountyMNB972.92
48Price CountyWIB262.92
49Jefferson CountyWIB82.88
50Itasca CountyMNB1412.87
51Sauk CountyWIB112.86
52Douglas CountyMNB512.79
53Lake of the Woods CountyMNB112.77
54Becker CountyMNB932.76
55Morrison CountyMNB162.75
56Rock CountyWIB42.75
57Lake CountyMNB1422.64
58Taylor CountyWIB72.64
59Racine CountyWIB72.57
60Steele CountyMNB12.50
61Lafayette CountyWIB32.50
62Iowa CountyWIC62.42
63Todd CountyMNC172.41
64Cook CountyMNC1282.39
65Wood CountyWIC42.38
66Milwaukee CountyWIC152.33
67St. Louis CountyMNC1872.32
68St. Croix CountyWIC72.29
69Aitkin CountyMNC532.28
70Ozaukee CountyWIC92.28
71Mahnomen CountyMNC162.25
72Pierce CountyWIC22.25
73Carlton CountyMNC332.24
74Grant CountyWIC32.17
75Washington CountyMNC312.16
76Pine CountyMNC192.06
77Sherburne CountyMNC242.04
78Green Lake CountyWIC132.04
79Wadena CountyMNC42.00
80Clay CountyMNC22.00
81Columbia CountyWIC102.00
82Marathon CountyWIC52.00
83Richland CountyWIC22.00
84Stearns CountyMNC551.99
85Chisago CountyMNC311.91
86Winnebago CountyWIC51.90
87Isanti CountyMNC191.86
88Nicollet CountyMNC21.84
89Goodhue CountyMNC101.83
90Wright CountyMNC641.69
91Eau Claire CountyWIC31.67
92Dunn CountyWIC31.67
93Polk CountyMNC201.63
94Pope CountyMNC251.54
95Anoka CountyMNC241.53
96Ramsey CountyMNC491.51
97Dakota CountyMND361.40
98Scott CountyMND171.35
99Kandiyohi CountyMND351.30
100Juneau CountyWID21.25
101Carver CountyMND401.23
102Meeker CountyMND231.22
103Koochiching CountyMND71.21
104Dane CountyWID231.20
105Olmsted CountyMND51.10
106Le Sueur CountyMND141.03
107Winona CountyMND11.00
108Wabasha CountyMND21.00
109Dodge CountyWID31.00
110Green CountyWID11.00
111Hennepin CountyMND950.99
112Grant CountyMND100.95
113Kanabec CountyMND70.93
114Lincoln CountyMND50.90
115Clark CountyWID40.88
116Calumet CountyWID20.75
117Jackson CountyMND70.71
118Rice CountyMND120.71
119Swift CountyMND30.67
120Yellow Medicine CountyMND50.60
121Brown CountyMND70.52
122Watonwan CountyMND50.50
123Blue Earth CountyMND90.50
124McLeod CountyMND50.50
125Houston CountyMND20.50
126Murray CountyMND20.50
127Monroe CountyWID10.50
128Crawford CountyWID10.50
129Big Stone CountyMNF90.39
130Cottonwood CountyMNF60.33
131Waseca CountyMNF60.33
132Freeborn CountyMNF40.25
133Stevens CountyMNF60.17
134Renville CountyMNF20.17
135Martin CountyMNF70.05
136Benton CountyMNF20.00
137Lyon CountyMNF50.00
138Redwood CountyMNF20.00
139Pepin CountyMNF10.00
140Nobles CountyMNF40.00
141Chippewa CountyMNF10.00
142Pipestone CountyMNF10.00
143La Crosse CountyWIF10.00
144Pepin CountyWIF10.00
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