Yes, in 2026, at least 99.5% of tap water in Spain is considered safe to drink and meets all strict European Union health and safety standards. However, the "palatability" or taste of the water varies significantly by region. In Madrid, the water is famous for being some of the best-tasting and purest in Europe because it comes from the granite mountains of the Sierra de Guadarrama. In contrast, in coastal regions like Barcelona, Valencia, or the Costa del Sol, the water is "hard" and often has a strong chlorine or mineral taste because it is sourced from desalinated seawater or limestone-rich rivers. While perfectly safe for drinking, cooking, and brushing teeth, many locals and tourists in these coastal areas prefer to use a filtered pitcher or buy bottled water for the taste. If you see a fountain labeled "Agua no potable," do not drink it, as it is likely recycled water used for irrigation. Otherwise, you can confidently refill your reusable bottle at most taps across the country to save money and reduce plastic waste.