The document discusses infrastructure for water supply systems. It defines water supply as the provision of water via pumps and pipes by public utilities or other organizations. An adequate water supply is crucial for functioning societies. The primary objectives of water supply systems are to source water from the best available locations, treat it to ensure quality and safety, and distribute it to meet demand. Sources can be surface water like rivers and lakes or groundwater like wells. Treatment processes filter, disinfect and remove impurities. Distribution is via gravity systems, pumping systems or a combination, with reservoirs helping regulate pressure and supply emergencies. Maintaining adequate quality, quantity and distribution of water is important for urban water infrastructure.