Browse lakes
As of September 3, 2026, LakeQuality tracks 37,603 lakes. Every page reports the measurements its agency published. Ontario and Québec lakes carry provincial measurements. Search for any lake by name, or browse by state and county.
Browse by State
All states →Lakes by country →Water-quality data for every state we cover, sorted by number of measured lakes.
Minnesota
6,760 lakes85 counties measured
Michigan
3,392 lakes82 counties measured
Wisconsin
3,133 lakes72 counties measured
Florida
3,122 lakes64 counties measured
New York
1,613 lakes59 counties measured
Texas
1,376 lakes221 counties measured
Montana
865 lakes54 counties measured
Massachusetts
829 lakes15 counties measured
North Dakota
826 lakes51 counties measured
Washington
792 lakes35 counties measured
Colorado
733 lakes62 counties measured
Wyoming
731 lakes21 counties measured
Georgia
693 lakes143 counties measured
Oregon
659 lakes35 counties measured
Arkansas
632 lakes68 counties measured
Illinois
594 lakes96 counties measured
Nebraska
592 lakes70 counties measured
Pennsylvania
570 lakes65 counties measured
South Dakota
469 lakes59 counties measured
Missouri
451 lakes93 counties measured
Alabama
422 lakes67 counties measured
North Carolina
395 lakes83 counties measured
Virginia
390 lakes99 counties measured
Indiana
387 lakes64 counties measured
Iowa
330 lakes91 counties measured
New Mexico
326 lakes30 counties measured
Oklahoma
319 lakes71 counties measured
Vermont
308 lakes14 counties measured
Utah
304 lakes29 counties measured
Idaho
301 lakes41 counties measured
Ohio
292 lakes81 counties measured
Tennessee
277 lakes75 counties measured
Kansas
239 lakes82 counties measured
Arizona
229 lakes14 counties measured
Nevada
223 lakes16 counties measured
Kentucky
189 lakes85 counties measured
Canada
Alberta, Saskatchewan, Manitoba, New Brunswick, Prince Edward Island, Yukon, Northwest Territories and Nunavut are not listed. No licensed lake-chemistry record for those places is published here.
Browse by County
All 2,589 counties ranked by average lake water quality — find the cleanest lake counties for a cabin, a fishing trip, or a move.
View county rankings →Cleanest Lakes Right Now
The top lakes on measured clarity and nutrients. See the full ranking →
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