What is the acceptable pH level range for pool water?

The acceptable pH level range for pool water is critical for maintaining both swimmer comfort and the effectiveness of disinfectants like chlorine. A pH range of 7.2 to 7.8 is ideal because it is slightly above neutral (pH 7) and supports optimal chlorine performance. When pH is maintained within this range, water is less likely to irritate swimmers’ skin and eyes while ensuring that the sanitizer is most effective at killing bacteria and algae. Additionally, balancing pH within this range helps to prevent corrosion of pool surfaces and equipment, which can occur if pH is too low, or scaling, which can occur if pH is too high. Therefore, option C reflects a standard guideline used in pool maintenance that promotes both hygiene and safety for pool users.