What is the appropriate level of free chlorine for a recreational pool?

The appropriate level of free chlorine for a recreational pool is crucial for ensuring the safety and health of swimmers. A concentration of 1 to 3 parts per million (ppm) of free chlorine is typically recommended for recreational pools. This range is effective in providing sufficient disinfection to kill harmful pathogens while also minimizing the potential for irritation to the skin and eyes of swimmers.

Chlorine levels below this range might not effectively sanitize the water, increasing the risk of waterborne illnesses. Conversely, levels above this range can lead to discomfort for users, such as skin and eye irritation, and may even produce harmful chloramines, which result from the reaction of chlorine with organic materials. Therefore, maintaining free chlorine levels in the 1 to 3 ppm range strikes a balance between effective sanitation and user comfort, making it the most appropriate choice for recreational pools.