This Is the Cleanest Lake within the U.S.—and It Has Crystal-clear Waters and Zero Air pollution

For those who’re planning on swimming in a lake in the USA any time quickly, there’s one which’s clearly superior.

The consideration belongs to Lake Superior, which stretches between the higher Midwest and Canada, touching Michigan, Minnesota, Wisconsin, and the province of Ontario, in line with a research trip rental platform Lake.com. The Nice Lake was lauded for its oxygen-rich water and low mineral content material.

In line with the research, the massive lake boasted practically undetectable algae-friendly phosphorus ranges and “second-to-none crystal-clear water.” In truth, Lake Superior was so clear, it acquired an general air pollution rating of 0 out of 10.

“We’re happy to search out that, usually talking, massive lakes stay very clear and protected to swim in, although monitoring any signage close to swimming spots and adhering to the indicated recommendation could prevent from catching a uncommon however nasty abdomen bug,” David Ciccarelli, the CEO of Lake.com, mentioned in a press release, including “bigger lakes appear to have 3 times much less sulfates and practically 4 instances much less [totality of minerals within the water].”

Past Lake Superior, Washington’s Lake Chelan was named the second-cleanest lake in America with an general air pollution rating of simply 0.14, adopted by Lake Hartwell, which straddles each Georgia and South Carolina and boasts an general air pollution rating of 1.73.

On the opposite finish of the spectrum was Florida’s Lake Okeechobee, which was named the dirtiest lake within the U.S. That lake, which sits within the southern half of the state simply west of the city of Jupiter, had an general air pollution rating of 10 and options “visibly murky water” and “lead contamination.” 

That was adopted by Idaho’s American Falls Reservoir. Whereas the research mentioned the man-made reservoir appeared clear to the human eye, chemical exams discovered the presence of ammonia, “which shouldn’t be current in any respect.” Lake Texoma, which borders Texas and Oklahoma, was discovered to be the third-dirtiest lake within the U.S. due to having “poorly oxygenated, solids-heavy,” water with “a delicate rotten egg odor.”

To find out its research, Lake.com checked out 100 of the biggest lakes within the U.S. and analyzed chemical information between Jan. 1, 2020, and July 15, 2025. The researchers examined eight commonly-measured traits with a purpose to decide a lake’s cleanliness, together with dissolved oxygen, ammonia, lead, phosphorus, sulfate, complete dissolved solids, turbidity, and pH ranges.

A lake trip is usually a fashionable selection irrespective of the time of 12 months with choices for fishing, swimming, boating, and even ice racing within the winter.