The TWB is responsible for providing piped potable water to the urban areas of Nuku'alofa and Neiafu and supplies water to the whole island of Eua except for one village and to the Pangai-Hihifo water scheme on the Lifuka Island in the Ha'apai group of islands.  Operating costs are covered by revenues based on metered consumption.  The MOH has the overall responsibility for rural water supplies.  Each village typically has its own Village Water Committee (VWC) operating the water supply scheme with its own water well, groundwater pumps and the pipe network.