What is the recommended pH of pool water when testing for disinfection efficacy of process equipment?

The recommended pH for pool water, when assessing disinfection efficacy of process equipment, is critical for ensuring optimal chlorine performance. A pH range of 7.2 to 7.6 is ideal because it allows chlorine to remain effective as a disinfectant in the water. Within this range, the balance between free chlorine and combined chlorine is maintained, maximizing disinfection capabilities, while minimizing potential irritants to swimmers.

Water with a pH lower than 7.2 may lead to increased chlorine effectiveness initially, but it can also cause irritation to the eyes and skin, as well as corrosion of pool equipment. If the pH is too high (beyond 7.6), chlorine becomes less effective as a sanitizer, making it harder to maintain safe swimming conditions.

This specific pH range supports an optimal environment for both swimmer comfort and disinfection efficacy, therefore ensuring the pool remains safe and clean for users.