What is the ideal pH range for swimming pool water?

The ideal pH range for swimming pool water is between 7.2 and 7.8. This range is crucial for several reasons. First, maintaining pH within this range ensures optimal chlorine effectiveness for disinfecting the water. Chlorine is most effective as a disinfectant when the pH is slightly alkaline, typically around 7.4 to 7.6, which is close to the natural pH of human skin and eyes, thus minimizing irritation.

Additionally, a pH that falls within this ideal range helps to prevent corrosion of pool equipment and surfaces, as well as scaling on tile and other pool features. It also provides a comfortable swimming environment for users, making their experience more enjoyable. When the pH is balanced, water clarity improves and the overall condition of the pool is enhanced.

The other pH ranges presented in the options do not support these aspects effectively: lower ranges can lead to skin and eye irritation due to acidity, while higher ranges can lead to scaling, reduce chlorine efficiency, and contribute to cloudy water. Therefore, maintaining pH between 7.2 and 7.8 is ideal for both health and maintenance of the pool.