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The most polluted river in Japan from the 1960s to the 1990s, leading to cleanup efforts. [218] River Churnet: Staffordshire, England: Became possibly the most polluted river in Europe in the 19th century. Improved after the decline of industry in Leek and the Churnet Valley. [219] Charles River: Massachusetts, United States
Water pollution (or aquatic pollution) is the contamination of water bodies, with a negative impact on their uses. [1]: 6 It is usually a result of human activities. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Water pollution results when contaminants mix with these water bodies. Contaminants can come from ...
The river supplies water to approximately 40% of India's population across 11 states [2] and serves an estimated 500 million people—more than any other river in the world. [3] [4] The Ganges is severely polluted with human waste and industrial contaminants. Currently, it is considered the most polluted river in the world. [5]
Water pollution occurs when water bodies, such as rivers, lakes and oceans are contaminated with harmful substances. These substances degrade the water quality and are toxic to humans as consumers and to the environment. [7] The contamination in a river can come from a point source or non-point source pollution. [8]
Polluted stormwater is one of the biggest threats to clean water in the U.S., but it's not treated like wastewater. Here's why.
In 2022, the most comprehensive study of pharmaceutical pollution of the world's rivers found that it threatens "environmental and/or human health in more than a quarter of the studied locations". It investigated 1,052 sampling sites along 258 rivers in 104 countries, representing the river pollution of 470 million people.
40 million pounds of plastic flows along Guatemala’s Motagua River each year. Startup 4Ocean is trying to stem the flow. The mission to clean up one of Central America’s most polluted rivers
Environmental threats to rivers include loss of water, dams, chemical pollution and introduced species. [3] A dam produces negative effects that continue down the watershed. The most important negative effects are the reduction of spring flooding, which damages wetlands, and the retention of sediment, which leads to the loss of deltaic wetlands.