Lake Tahoe (California/Nevada): Known for its crystal-clear water and stunning alpine scenery, Lake Tahoe is one of the cleanest lakes in the U.S., with visibility of up to 70 feet.
Crater Lake (Oregon): This lake, formed by a volcanic eruption, is the deepest in the U.S. and known for its pristine water, which is replenished only by rain and snow
Lake George (New York): Nicknamed the "Queen of American Lakes," Lake George offers exceptionally clean water, perfect for swimming and other recreational activities.
Lake Coeur d'Alene (Idaho): Surrounded by scenic forests and mountains, Lake Coeur d'Alene is famous for its clean water, ideal for swimming, boating, and fishing.
Flathead Lake (Montana): One of the largest natural freshwater lakes in the western U.S., Flathead Lake boasts pristine, clear water, surrounded by unspoiled wilderness
Newfound Lake (New Hampshire): Known for its purity, Newfound Lake has some of the cleanest freshwater in New England and offers excellent swimming opportunities
Lake Jocassee (South Carolina): Nestled in the Blue Ridge Mountains, Lake Jocassee is famous for its clean, cool water and beautiful waterfalls, making it a top spot for swimmers
Lake Chelan (Washington): This long, narrow lake is one of the clearest in the U.S., known for its deep blue waters and excellent visibility for swimmers and divers