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Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking , industrial water supply, irrigation , river flow maintenance, water recreation or many other uses, including being safely returned to the environment.
The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Astronaut Jack Lousma taking a shower in space, 1974
Private water companies have existed in the United States for more than 200 years and number in the thousands today. The private water industry serves more than 73 million Americans. According to the National Association of Water Companies (NAWC), more than 2,000 facilities operate in public-private partnership contract arrangements.
United States. The US Safe Drinking Water Act and derivative legislation define "public water system" as an entity that provides " water for human consumption through pipes or other constructed conveyances to at least 15 service connections or serves an average of at least 25 people for at least 60 days a year." [1]
Early water treatment was primarily focused on the aesthetic properties of water, taste and odor. Writings from ancient Greece indicate that boiling and filtering water through charcoal were used along with exposing the water to sunlight and straining.
Mexico-U.S. water treaties are jointly administered by the International Boundary and Water Commission, which was established in 1889 to maintain the border, allocate river waters between the two nations, and provide for flood control and water sanitation.
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