Water is the most important element of the biosphere which is essential for the existence of all forms of life. Water is a renew¬able resource and its availability depends upon the climate, geo-graphical and physical conditions, affordable technological solu¬tions and the efficiency with which water is conserved and used. In a civilized society, the human activities and economic develop¬ment are dependent upon water.

• Water is getting depleted due to following reasons listed below-
• Global warming
• Collecting solid wastes instead of flushing with cleaning water;
• Increasing efficiency of water use through "good housekeeping”
• Reuse of purified waste water for some of the cleaning operation
• Irrigation for Feed Production - in competition with other local demands for crop production and reducing downstream flows and downstream water quality;
• Water for Animal Production - consumption and cleaning livestock housing; and
• Water for Processing Animal Products - used in industrial processing animal and waste disposal.