In 2026, Disney Parks and Resorts primarily utilize bromine as the sanitizing agent for their water-based attractions and most hotel pools. Bromine is often preferred in high-volume theme park environments because it is more stable than chlorine in warm water and produces a less intense chemical odor. It is also generally gentler on the eyes and skin, which is a high-value benefit for families spending hours in the water. However, some locations, such as the massive "Stormalong Bay" at the Yacht & Beach Club or the "Big Blue Pool" at Art of Animation, use a saltwater filtration system. While these saltwater systems still produce chlorine naturally through electrolysis, they lack the harsh "bleach" smell associated with traditional liquid chlorine. For guests with specific sensitivities, bromine remains the standard across major rides like Pirates of the Caribbean and it's a small world, contributing to that distinct "Disney water" scent fans know so well.