Despite the stubborn perception that the river is dirty and lifeless, this is no longer the case. The Thames is currently one of the cleanest city waterways in the world.
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The River Thames was once a highly depressed, brown, opaque fluid, a victim of industrial exploitation and human waste. Today, it's still brownish and opaque, and it probably always will be—largely because the tides churn up mud from the bottom of the river every day.
–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.
With the government in the summer of 1858 greenlighting affirmative action, engineering genius Sir Joseph Bazalgette could start work on his ambitious new drainage system for London. It began in earnest in 1859, was finished in 1875, and by 1887, the dumping of sewage into the Thames had stopped completely.
The river Thames in London was so starved of oxygen in August 2022, due to sewage and hot weather, that it was effectively on life support, New Scientist can reveal. A specialised boat was used to directly inject the gas into the water for 11 days that month to prevent plants and fish dying.
With less population, the Linapacan Island in Philippines offers the most serene and clear beaches. The water here is the purest of all. So all you divers out there can enjoy a swim in immaculate water here.
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 Congo is the deepest river in the world. Its headwaters are in the north-east of Zambia, between Lake Tanganyika and Lake Nyasa (Malawi), 1760 metres above sea level; it flows into the Atlantic Ocean.