Lakes by State
LakeQuality grades 14,418 lakes across 41 states and 3,238 counties. Pick a state to see its cleanest lakes, county rankings, and full report cards.
Ontario
2,822 lakes graded across 40 counties
Minnesota
2,394 lakes graded across 77 counties
Florida
2,159 lakes graded across 59 counties
Wisconsin
1,428 lakes graded across 69 counties
Québec
1,018 lakes graded across 70 counties
Michigan
646 lakes graded across 62 counties
Missouri
278 lakes graded across 77 counties
Vermont
228 lakes graded across 14 counties
Wyoming
220 lakes graded across 19 counties
Iowa
209 lakes graded across 76 counties
Kansas
196 lakes graded across 75 counties
New York
189 lakes graded across 48 counties
Montana
188 lakes graded across 13 counties
Virginia
175 lakes graded across 61 counties
Utah
168 lakes graded across 28 counties
Texas
164 lakes graded across 90 counties
Oklahoma
157 lakes graded across 60 counties
North Carolina
154 lakes graded across 58 counties
North Dakota
149 lakes graded across 48 counties
Illinois
148 lakes graded across 45 counties
Arkansas
137 lakes graded across 52 counties
Colorado
118 lakes graded across 49 counties
Kentucky
113 lakes graded across 75 counties
Alabama
110 lakes graded across 45 counties
Massachusetts
105 lakes graded across 12 counties
Oregon
99 lakes graded across 25 counties
Tennessee
76 lakes graded across 42 counties
Arizona
75 lakes graded across 14 counties
New Mexico
73 lakes graded across 22 counties
Nebraska
69 lakes graded across 49 counties
Nevada
56 lakes graded across 12 counties
Washington
56 lakes graded across 18 counties
Georgia
56 lakes graded across 35 counties
Ohio
52 lakes graded across 28 counties
Idaho
50 lakes graded across 17 counties
Maryland
24 lakes graded across 10 counties
Indiana
22 lakes graded across 7 counties
Maine
18 lakes graded across 4 counties
South Dakota
9 lakes graded across 5 counties
South Carolina
6 lakes graded across 5 counties
Pennsylvania
4 lakes graded across 4 counties
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