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Water pollution is a major global environmental problem because it can result in the degradation of all aquatic ecosystems – fresh, coastal, and ocean waters. [75] The specific contaminants leading to pollution in water include a wide spectrum of chemicals, pathogens, and physical changes
Topsoil runoff from farm, central Iowa (2011). Water pollution in the United States is a growing problem that became critical in the 19th century with the development of mechanized agriculture, mining, and manufacturing industries—although laws and regulations introduced in the late 20th century have improved water quality in many water bodies. [1]
Per- and polyfluoroalkyl substances – also known as PFAs – are widely used, long lasting chemicals found in many consumer, commercial, and industrial products. [2] Breaking down very slowly in the environment, PFAs have been found in water, air, fish, soil, the blood of humans and animals, and food products around the world.
“With drinking water, going back to that kind of historical legacy of use, these types of chemicals were and still are to some extent widely used in firefighting foams,” said Jonathan Meiman ...
A water researcher tests a sample of water for PFAs, Tuesday, Feb. 14, 2023, at the U.S. Environmental Protection Agency Center for Environmental Solutions and Emergency Response in Cincinnati.
Types of nonpoint source water pollution include sediment, nutrients, toxic contaminants and chemicals and pathogens. Principal sources of nonpoint source water pollution include: urban and suburban areas, agricultural operations, atmospheric inputs, highway runoff, forestry and mining operations, marinas and boating activities.