Yes, the tap water in Monterosso al Mare and the rest of the Cinque Terre is safe to drink and meets the strict safety standards of the European Union. The water in the Italian Riviera is typically sourced from clean mountain springs and deep underground aquifers. While perfectly safe, the water in coastal regions can have a high mineral content—often referred to as "hard water"—which may give it a slightly different taste than what you are used to at home. Many travelers find that it is crisp and refreshing, especially from the public "nasoni" (drinking fountains) scattered throughout the village. If you are sensitive to the taste of chlorine or minerals, using a reusable filtered water bottle like a LifeStraw Go is an excellent eco-friendly way to stay hydrated without buying plastic bottles.