Select Your State
Pick your state to search its lakes and open county-level water quality report cards. LakeQuality grades 5,469 lakes across 12 states and 520 counties.
MN
CMinnesota
2,403 lakes · 75 counties
Cleanest: East Fox Lake
Search Minnesota lakes →WI
CWisconsin
1,422 lakes · 69 counties
Cleanest: Geneva Lake
Search Wisconsin lakes →MI
BMichigan
628 lakes · 71 counties
Cleanest: Windover Lake South Basin; Freeman Township
Search Michigan lakes →MO
CMissouri
317 lakes · 82 counties
Cleanest: Lake Capri
Search Missouri lakes →NY
CNew York
189 lakes · 48 counties
Cleanest: Blue Mtn Lake
Search New York lakes →IA
DIowa
170 lakes · 75 counties
Cleanest: West Okoboji Lake
Search Iowa lakes →ND
CNorth Dakota
150 lakes · 50 counties
Cleanest: Wood Lake
Search North Dakota lakes →IL
DIllinois
144 lakes · 45 counties
Cleanest: Diversey Harbor Lake
Search Illinois lakes →IN
DIndiana
22 lakes · 63 counties
Cleanest: Middle Lagoon Lake
Search Indiana lakes →OH
DOhio
17 lakes · 13 counties
Cleanest: Caesar Creek Lake
Search Ohio lakes →SD
DSouth Dakota
4 lakes · 13 counties
Cleanest: Canyon Lake
Search South Dakota lakes →PA
DPennsylvania
3 lakes · 8 counties
Cleanest: Lake Wallenpaupack
Search Pennsylvania lakes →