The NWSDB has been serving for the island nation supplying of purified drinking water, maintain hygiene for the past four decades having established in 1975 as a prestigious statutory body in the discipline of sanitation engineering. It had been delivering the service in a similar capacity under the administration of public works department, prior to taking over business by the ministry of irrigation, power & highways in 1995. The service has been monopolizing the public utility sector while complying with the vison and mission statements of NWSDB. Currently the NWSDB serves approximately two million consumers envisioning to expand its` horizon to build a healthy nation.