–The Smith River is the wildest and cleanest river in the country outside of Alaska — indeed, it is one of the cleanest rivers in the world. — The Smith is the only major undammed river in California.
People Also Ask
For the cleanest water in Europe: The Lobau River, AustriaJust east of Vienna, the Lobau River runs through the Donau-Auen National Park.
The Mississippi RiverThis once pristine waterway is perhaps the most polluted in the United States. Part of the problem stems from agriculture. The Mississippi River traverses much of America's heartland, drawing no end of runoff from factory farms. Animal waste isn't the only problem.
Rebecca Thiele. The White River from the Indianapolis Art Center's ArtsPark. Indiana has the most miles of rivers and streams deemed too polluted to swim in of any state. Indiana has the most polluted rivers and streams of any state.
–The Smith River is the wildest and cleanest river in the country outside of Alaska — indeed, it is one of the cleanest rivers in the world. — The Smith is the only major undammed river in California.
In a people-powered study of pollutant levels in UK freshwater sites, the River Dart was the only one, out of 48, to pass all five parameters. The river runs 75km from Dartmoor and into the sea at Dartmouth.