What is the acceptable level of free active chlorine in public swimming pools?

The acceptable level of free active chlorine in public swimming pools is 1.0 ppm. This concentration is maintained to ensure effective disinfection of the water, helping to eliminate harmful microorganisms and pathogens while remaining safe for bathers. It strikes a balance that provides sufficient protection against contaminants without causing irritation or discomfort to swimmers.

Free active chlorine levels are crucial for maintaining proper water quality in pools, and maintaining this level contributes to the overall hygiene and safety of the swimming environment. Higher concentrations can lead to issues such as chlorination irritation and can cause discomfort for users.

Thus, a level of 1.0 ppm is recognized as the optimal standard for public pool operations, ensuring the safety and comfort of users while maintaining effective sanitation. Other levels, whether higher or lower, do not meet this balance of effectiveness and safety.