Yes, the tap water in Key West is perfectly safe to drink and meets all federal and state environmental standards. The water is supplied by the Florida Keys Aqueduct Authority (FKAA), which primarily sources its water from the Biscayne Aquifer on the Florida mainland. The water undergoes an extensive treatment process including lime softening to remove hardness, filtration, and disinfection with chloramines to ensure it remains clean as it travels through the 130-mile-long pipeline to the end of the Keys. Some visitors may notice a slight difference in taste compared to their home water due to the mineral content or the specific disinfectants used, but it is potable. If you are sensitive to the taste, using a standard charcoal filter (like a Brita) is a common and effective solution for locals and tourists alike.