What pH range provides better chlorine efficiency in pool water?

Maintaining a pH level in the range of 7.2 to 7.4 is optimal for chlorine efficiency in pool water. At this pH level, chlorine operates most effectively as a disinfectant. The reason for this lies in the relationship between pH and the forms of chlorine present in the water. When the pH is maintained between 7.2 and 7.4, a higher percentage of free available chlorine exists in the hypochlorous acid form (the more effective form for sanitation) rather than the hypochlorite ion form, which is less effective in killing bacteria and other pathogens.

Having a pH below 7.2 can lead to increased irritation of skin and eyes, as well as corrosion of pool equipment. Additionally, pH levels higher than 7.4 can result in chlorine becoming less effective, leading to potential issues with water clarity and sanitation.

Therefore, maintaining the pH in the range of 7.2 to 7.4 ensures that chlorine remains at its most potent level for effective pool sanitation, making it the preferred choice for chlorine efficiency.