Which physical property of water must be maintained for proper sanitizer effectiveness?

Maintaining the pH level of water is crucial for the effectiveness of sanitizers in pool water. The pH level influences how well chlorine and other sanitizers work to kill bacteria and other pathogens. If the pH is too low, the sanitizer can become too aggressive, potentially leading to skin irritation and diminished effectiveness. Conversely, if the pH is too high, the sanitizer may not be able to effectively kill harmful microorganisms, resulting in a greater risk of waterborne illnesses.

In a well-maintained pool, the ideal pH range is typically between 7.2 and 7.8. By keeping the pH within this optimal range, pool operators can ensure that the sanitizers remain effective, thereby enhancing water safety and quality for swimmers.