According to WHO (1948) defined Health as a state of complete physical, mental and social well being and not merely the absence of disease or infirmity. Health is the natural state of a living organism. It means if a person is not in the least affected by any disease, he is called healthy. In other words, a man is said to be healthy when he has got no bodily pain or disease (Deodhar, 1983).

Every year, due to diarrhoea, around 842,000 people are estimated to die. The main reasons of the diarrhoea are unsafe drinking water, sanitation and hand hygiene (WHO 2015). In 2015, 32% of the world's population (2.4 billion) lacked improved sanitation facilities and 663 million people used unimproved drinking water (UNICEF 2016). According to United Nations by the middle of this century between 2 billion to 7 billion people will be faced with water scarcity. So, there is little wonder that water has been described as “the oil of the twentyfirst century”(Schumacher 2005).