This paper explores the challenges of coastline cleaning efforts, which involve a wide range of community members, and presents a yearlong investigation into designing technology to support these cleaning tasks. It examines how participatory design research, combining interactive technology with co-design activities, can help facilitate collaboration among community-based stakeholders in alignment with the UN goals. The research delves into the difficulties stakeholders face in sharing responsibilities and collaborating effectively. This study contributes to the literature by providing new insights into designing interactive technologies that enhance stakeholder participation, foster a socially and environmentally sustainable society.