Importance of water; nature and sources of water. Water crisis related to the environment. Estimation of water demand; requirement and consumption in the household, industrial, and public units. Estimation of the quantities of natural raw water resources, river, lake, and groundwater. Evaluation of surface and groundwater quality and standards. Criteria for selecting water sources for water supply systems and standards for water supply. Water treatment processes; aeration, pH adjustment and softening, coagulation and flocculation, sedimentation, filtration, and disinfection. Design of distribution system.