Water is the most important thing in life after air. Approximately three-quarters of our body consists of water and one can not survive more than 4-5 days without drinking water. In addition, water is also used for cooking, washing, bathing, and cleaning dirt around the house. Water is also used for industrial, agricultural, fire, recreation, transportation, and others. Diseases that infect humans can also be transmitted and spread by water. These conditions could lead to outbreaks of disease course everywhere.
The volume of water in the human body an average of 65% of the total weight, and volume varies greatly in each person, and even varies between parts of the body. Several human organs that contain a lot of water, among other things, the brain 74.5%, bone 22%, kidney 82.7%, 75.6% muscle, and the blood of 83%.
Each day approximately 2272 liters of blood cleared by the kidneys, and about 2.3 liters of urine produced into. The rest is absorbed back into the bloodstream. In everyday life, such as water used for drinking, bathing, cooking, washing, cleaning, solvents medicine, and industrial waste material carriers.
Terms of the science of public health, the provision of clean water should be able to meet people's needs because of limited water supplies facilitate the occurrence of disease in the community. The average volume of water required each individual per day ranged from 150-200 liters or 35-40 gallons. The water needs will vary depending on climatic conditions, living standards, and customs of the people
book
Introduction to Environmental Health Dr. Budiman Chandra, Medical Book Publishers EGC
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