On the Dutch side (Sint Maarten), the tap water is generally considered safe and reliable to drink. It is produced by modern desalination plants using reverse osmosis and meets high-quality standards set by the World Health Organization. However, many visitors and locals still prefer bottled water due to the heavy mineral content or a slight chlorine taste that can be off-putting. On the French side (Saint Martin), the water is also officially potable, but the infrastructure is older and can be more susceptible to disruptions, especially in the wake of major storms. A high-value peer tip for 2026 is to check with your specific accommodation or villa host; while the city supply is safe, older plumbing or private cisterns in some houses can affect the water's taste or clarity. For brushing teeth and cooking, tap water is perfectly fine across the island, but for pure hydration, most travelers opt for the widely available bottled options to avoid any potential stomach sensitivity while on vacation.