Yes, the tap water in the Azores is generally safe to drink and meets all European Union safety standards for water quality. The archipelago's water supply primarily comes from underground aquifers formed by volcanic rock, which provides natural filtration. However, there are some local nuances to be aware of in 2026. Because of the islands' volcanic geology, the water in certain areas—particularly on São Miguel Island near the Furnas volcano—can have a higher concentration of fluoride or minerals, which might give it a slightly different taste than what you are used to. While safe, some visitors with sensitive stomachs may prefer bottled water for the first few days to avoid any minor digestive adjustments. In the main cities of Ponta Delgada, Angra do Heroísmo, and Horta, the municipal treatment systems are top-tier. Most locals drink tap water daily, though "Gás" (carbonated) bottled water remains a popular cultural choice for meals. If you are staying in a very old rural house, it is always wise to ask the host if the pipes have been recently modernized before drinking large quantities from the tap.