Municipal corporations are responsible for collecting raw water sources, treating the water, and distributing it through piping networks to consumers. The water supply process involves intake works to draw water from sources, a treatment plant to purify the water by processes like aeration, sedimentation, coagulation and filtration, transmission mains to move treated water to service reservoirs, and distribution mains that deliver water to customers through layouts like gridiron, radial, dead-end, or circular methods.