In 2026, the tap water in Cala d'Or, Mallorca, is technically safe to drink and meets European Union safety standards, but most visitors and locals prefer bottled or filtered water. The primary issue is not safety, but taste and mineral content. Mallorca’s water is famously "hard," containing high levels of calcium and magnesium, and it often has a distinct chlorine taste due to the desalination and treatment processes used to manage the island's limited freshwater resources. While brushing your teeth or cooking with it is perfectly fine, drinking large quantities can sometimes cause minor stomach sensitivity for those not used to the high mineral concentration. In 2026, many hotels in Cala d'Or have installed advanced "osmosis" filtration systems to improve the flavor of the water, but "Agua con gas" or "Agua sin gas" in glass or recycled plastic bottles remains the standard for hydration among tourists.