the majority of metro cebu population owns pourflush toilets the remaining population uses flush toilets pit latrines or do not have any toilet at all only of households evacuate black water ie wastewater with human wastes through sewers while is evacuated into septic tanks and through drainage and therefore have no treatment in addition only of grey water ie wastewater without human wastes is evacuated through sewerage most being evacuated through drainage with no treatment or into septic tanks figure