Yes, you can safely drink the tap water in Croatia in 2026. The public water supply is of high-fidelity quality and meets the stringent safety standards set by the European Union. Croatia is actually one of the few countries in Europe with significant underground water reserves, and the water is frequently tested and treated to ensure it is free of harmful contaminants. While the water is safe everywhere from Zagreb to Split, it is a "High-Fidelity" tip to note that the mineral content varies; in some coastal areas, the water can be quite "hard," meaning it has a distinct mineral taste that some visitors find unusual. On some of the smaller, remote islands, water is often brought in by tanker or collected via cisterns; while still technically safe, many locals and tourists on these islands prefer bottled water for drinking. Overall, you can confidently refill your reusable bottle at any public fountain or hotel tap, saving money and reducing plastic waste during your Mediterranean holiday.