Jersey Water to switch on desalination plant – France Millions of litres of water will be treated and pumped into the Val de la Mer reservoir for use as drinking water. The island has received 25% less rainfall this year than the long-term average, according to Jersey Met. Switching on the plant should ensure there is enough drinking water available for the island’s population. (LINK). HIWI042019-09-21T23:46:23+02:00