PUB request s for proposals to build fifth desalination plant Singapore, 7 Feb 2017 PUB, Singapore’s national water agency, put up a Request for Proposal (RFP) today for the development of Singapore’s fifth desalination plant. To be built on Jurong Island under a Design-Build-Own-Operate (DBOO) arrangement by 2020,the plant will add another 137,000 cubic metres, or approximately 30 million imperial gallons of desalinated water (mgd) a day to Singapore’s water supply, enhancing water supply resilience. DME GmbH2017-02-09T08:05:37+01:00