Greywater management in Surabaya (Indonesia)

Due to low public awareness and lack of infrastructure, domestic wastewater management has only been for blackwater, so greywater needs to be appropriately managed. The greywater that needs to be managed properly will impact environmental health and sanitation because 70% of domestic wastewater comprises greywater. Minister of Health Regulation No. 3 of 2014 concerning Community-Based Total Sanitation (STBM) regulates the national strategy in sanitation through 5 pillars of behavior change. The declaration of the five pillars of STBM for the City of Surabaya is contained in Surabaya Mayor Regulation Number 84 of 2023. By 2023, the City of Surabaya has been achieved the three pillars of STBM. However, pillar five regarding greywater management has not been achieved. The 2022 EHRA Surabaya study reported that Sukolilo District is a sanitation-prone area and does not have a greywater management system. Thus, increasing the achievements of greywater management in this area can support the achievement of STBM pillar 5 in the city of Surabaya. This research aims to assess the achievements of greywater management in Sukolilo District, Surabaya City, based on technical, social, and institutional aspects. It also aims to determine strategies for improving greywater management achievements. Primary data was collected through field observations, community questionnaires, and institution interviews. Meanwhile, secondary data was collected through reports and documents related to sanitation. Analysis was carried out descriptively qualitatively and descriptively quantitatively through weighted scoring. A SWOT analysis is carried out to determine the strategy. The results of the technical aspect analysis show that the greywater channel is not closed and tight and is not connected to the absorption area or processing system. Analysis of social aspects shows low knowledge and behavior of the community but a high desire to manage greywater. Analysis of institutional aspects shows problems with coordination, monitoring, and evaluation and a need for more human resources. The SWOT analysis results are in the ST quadrant, so efforts can be made by repairing channels and providing a communal IPAL, counseling and routine FGDs at the RT level, and carrying out independent monitoring and evaluation by the community