Improper greywater management degrades environmental quality and public health. Community-based Total Sanitation (STBM) aims for 100% open defecation-free (ODF) status and 50% greywater management. In 2023, Surabaya achieved 100% ODF, but greywater management targets remain unmet, especially in the sanitation-prone Sukolilo District. This research assesses greywater management in Sukolilo, focusing on technical and social aspects, and offers strategy recommendations. Surveys and interviews were conducted for primary data, with secondary data from relevant literature and regional documents. Data analysis was descriptive, qualitative, and quantitative. The technical analysis revealed that greywater channels are not connected to infiltration wells or treatment systems. Social analysis showed low community awareness and behavior regarding greywater management. Improvement strategies include repairing channels to be closed, watertight, and connected to on-site treatment systems with infiltration wells or communal biofilter treatment, allowing the community to use treated water for irrigation. Enhancing public knowledge through continuous education by health workers and related parties and facilitating community efforts through Focus Group Discussions (FGDs) involving community leaders, government, and experts is also essential.