Generally, Americans can safely drink the tap water in St. Martin, but the recommendation varies slightly depending on which side of the island you are on. On the Dutch side (Sint Maarten), the water is produced by modern desalination plants using reverse osmosis and meets high safety standards; it is considered safe for drinking, cooking, and brushing teeth. On the French side (Saint-Martin), the water also meets EU safety regulations, but the aging infrastructure in certain older villages can occasionally lead to a slight "chlorine" taste or sediment issues. In 2026, most luxury resorts and modern villas on both sides of the island have their own high-tech filtration and UV systems, making the tap water perfectly palatable. However, it is a peer-to-peer essential to know that many locals still prefer bottled water for the taste. If you have a particularly sensitive stomach, sticking to bottled or filtered water is a high-value strategy for "total peace of mind," but you do not need to worry about the accidental ingestion of tap water causing illness as you might in other tropical regions.