The Adelaide Desalination plant (ADP), formerly known as the Port Stanvac Desalination Plant, is a sea water reverse osmosis desalination plant located in Lonsdale, South Australia which has the capacity to provide the city of Adelaide with up to 50% of its drinking water needs. In September 2007, South Australian Premier Mike Rann announced that the State Government would fund and build a desalination plant to ensure Adelaide's water supply against drought. The plant was financed and built by SA Water, a state-owned corporation.