In September 2005, Singapore turned on its fourth National Tap, desalinated water, with the opening of the SingSpring Desalination Plant in Tuas. The SingSpring desalination plant was PUB’s first public-private partnership (PPP) project, where SingSpring Pte Ltd was appointed to design, build, own and operate the plant and supply water to PUB. This plant can produce 30 million gallons of water a day (136, 000 cubic meters) and is one of the region’s largest seawater reverse-osmosis plants.