The Government of Indonesia has secured Loan from German Financial Cooperation (KfW) for implementation Regional Water Supply System, with the aim to provide adequate, safe and cost-effective water supply services to underserved urban and peri-urban centres of Wosusokas area, in compliance to the Government Regulation (PP) No . 122 of 2015 concerning Drinking Water Supply Systems (SPAM). The Consultancy services aims are the Detailed design review (10 months), tender documents preparation for no. 5 works packages (2 months) and supervision and Contract management (36 months)