week 10 - Principles of Public Health(Week 10 Water...

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Principles of Public Health (Week 10) Water, Wastewater & Solid Waste (part 1) Water is the lifeblood of any community Water is a physiological necessity to humans; it is essential for life o Drinking and other domestic use Healthful comfortable living depends on: o Availability adequate supply o Safe and good quality water Water-Access About 50% of the world’s population lacks access to clean water o Sanitation o Drinking o Other human needs Improved access and quality would reduce diarrheal cases by 37% 1.1 Billion people live without regular access to safe drinking water 2.4 billion people lack access to adequate sanitation Water-related diseases kill a child every eight seconds o Responsible for 80% of all illnesses and deaths in the developing world Dependence on Water We can go about a month without food, but only 5-7 days without water o Human adult is 66% water o Blood is 83% water o Bones are 25% water o Brain is 75% water Water is essential for digestion, transport & waste removal We require 1-3 quarts per day just to maintain bodily functions Lifeblood of any community In the US, we require about 150 gallons per day o Drinking & other domestic purposes o Cost of about 27 cents per day Industrial use may be 2000 gallons per person per day About 340 billion gallons of water are used daily in the U.S. o Includes water used in irrigation, in industry, fire fighting and street cleaning Water is used for: Drinking Cooking Making ice Bathing Cleaning
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Personal hygiene Laundry Toilet flushing Dishwashers Heating & air conditioning Typical Household Use 2/3 of the water used in an average home is used in the bathroom Domestic Uses Automatic dishwashers use about 15 gallons per load Washing one load of clothes in an automatic washer uses about 45 gallons The average bath takes about 36 gallons of water An average residence uses 107,000 gallons of water per year Domestic Water Wastage It takes: o 2 gallons to brush your teeth o 2 to 7 gallons to flush a toilet o 25 to 50 gallons to take a 10 minute shower A leaking faucet can waste up to 100 gallons of water a day Domestic water conservation Water-saving toilets Faucet efficiency Use the dishwasher Use rain gauges to assist with lawn care o Lawns generally need an inch of rain/week o 30-60% of outdoor water use is for lawns Fix leaks Switch to front-loading washers Ditch the bottled water Essential to agricultural & industrial development Manufacturing products Transport of goods over water bodies Disposaal of sewage effluent Agricultural irrigation Mining Watering livestock Electricity generation Public fountains Ornamental ponds Street cleaning
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Manufacturing uses 10 gallons of water refine one gallon of gasoline 1,400 gallons of water to process a meal of ¼ lb hamburger, French fries and a soft drink 1,500 gallons of water to process 31 gallons of beer
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