ISDP works to ensure that vulnerable communities have reliable access to safe, adequate, and sustainable water and sanitation services. The organization implements a range of activities, including the construction, rehabilitation, and maintenance of water supply systems, such as shallow wells, boreholes, and water storage facilities. ISDP also establishes gender-segregated latrines, handwashing stations, and safe drinking water points to improve sanitation and hygiene practices.

Beyond infrastructure, ISDP promotes community-led hygiene and sanitation initiatives, delivering targeted behavior change communication campaigns and training local water committees to manage and protect water resources. These efforts reduce the prevalence of waterborne diseases, improve public health outcomes, and strengthen community resilience to climaterelated shocks such as droughts and floods. ISDP also integrates WASH into other interventions, including health, nutrition, education, and shelter programs, providing holistic interventions that ensure hygiene and sanitation practices are consistently reinforced across all sectors.