What is the acceptable range for pH levels in swimming pool water?

The acceptable range for pH levels in swimming pool water is 7.0 to 7.8. Maintaining pH levels within this range is crucial for several reasons. Firstly, a pH level that is too low (acidic) can lead to skin and eye irritation, as well as corrosion of pool equipment and surfaces. Conversely, if the pH level is too high (alkaline), it can result in problems such as scaling and reduced effectiveness of chlorine as a sanitizer.

In this range, the water is considered balanced, meaning it mitigates hazards associated with corrosion and scaling, while also ensuring that chlorine remains effective in sanitizing the water. Furthermore, this pH range is how most swimmers prefer to experience the water, minimizing discomfort and irritations.

The other options fall outside the ideal range: levels below 7.0 are too acidic, while levels above 7.8 are too alkaline, compromising both the safety and the effectiveness of pool sanitation practices.