This study initiated by the Metropolitan Waterworks and Sewerage System Regulatory Office (MWSS RO) with the University of the Philippines Center for Women’s and Gender Studies (UPCWGS) will contribute to the growing literature on gender and WASH. The project also complies with national legislation such as the Magna Carta of Women and the Philippine Commission on Women Memorandum Circular 2014-05 which require government agencies to collect sex-disaggregated data (SDD). It has an even more foundational value: by collecting SDD from MWSS RO concession areas, it plants a seed to inform planning, budgeting, programming, and policy formulation in the water sector, starting from the local level up to the national level.