enhs660.waterpollution.2010.pdfadobe

enhs660.waterpollution.2010.pdfadobe - Water Facts A human...

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Water Facts A human can live up to a month without food, but can survive for about a week without water. Average requirement for human consumption of water per day is approximately 2.5 liters (about 2 ½ quarts). About two-thirds of the human body is made up of water.
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Water Use in the U.S. Average person uses about 100 gallons (about 400 liters) of water per day. Average residence uses over 100,000 gallons (about 400,000 liters) during a typical year. Most of this household water (50-70%) is used for outdoor purposes such as watering lawns and washing cars.
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Residential Uses for Water in a Southern California Community Landscape, 51% Faucets, 8% Leaks, 5% Baths, 1% Dish Washers, 1% Toilets, 14% Clothes Washers, 11% Showers, 9% Source: Data are from the Irvine Ranch Water District, Irvine, California.
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Residential Water Use in the US Water Use in Typical U.S. Home: -35% Toilet (Reflects lack of low flush bowls) - 25% Laundry - 20% Bathing (shower and bath) - 11% Bath Room Sink - 5% Kitchen Sink - 3% Dishwasher - 1% Garbage Disposal
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Residential Water Use in the US Drinking Water Sources -Public Supplies 86% -Private Wells 14% U.S. Water use is 3X the average water use Developing Nations -60% of people in developing nations lack safe drinking water -80% of illnesses there is from contaminated water 30-50% of US water use is wasted (watering lawns, leaks)
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Water Use Statistics 2L/day/person = To sustain life 340L (90 gal.)/day/person = US Use (does 5,700L (1500 gal)/day/person fed = US Use Power Plants > Agriculture > Industrial > Communal
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Present and Future US Water Use 1950 – 150 million people = 700 billion L/day 1975 – 200 million people = 1,600 billion L/day 2000 – 260 million people = 2,600 billion L/day Conclusion: For every 1% increase in population, there is a 4% increase in water consumption
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Historical Importance of Water Early Man Rome Navigation Industrial Revolution
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Source Water “. . . the untreated and unfiltered water in rivers, streams, lakes, and aquifers from which water utilities draw water to be treated, filtered, and tested to produce drinking water.”
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Finished Water “. . . water leaving the plant and ready to be used by consumers after being collected, treated, and, usually, filtered by a water utility.”
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Surface Water “. . . includes water from lakes, streams, rivers, and surface springs. It is vulnerable to contamination by a variety of human, animal, and industrial sources and therefore has been subject to some of the most stringent testing and treatment requirements.”
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Examples of Surface Waters Source: Author.
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Groundwater “. . . comes from aquifers deep underground and is less susceptible to contamination than surface water.”
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Aquifer “A layer or section of earth or rock that
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enhs660.waterpollution.2010.pdfadobe - Water Facts A human...

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