Yes – and no! Ibiza’s tap water comes from underground rainwater lakes or from desalination plants that make seawater potable. But it contains high levels of salt or calcium and is heavily chlorinated. People who live on the island and drink it regularly do tolerate it. Visitors usually don’t like the taste and may get upset tummies if they drink too much of it. So why take a chance when on holiday. Use the tap water for cleaning your teeth but use bottled water for drinking – and rehydrating at the clubs.