What is the recommended level of free chlorine in pool water for safe swimming?

The recommended level of free chlorine in pool water for safe swimming is between 1 to 3 parts per million (ppm). This range is considered effective for disinfecting the water, ensuring that harmful bacteria and viruses are eliminated, while also being safe for swimmers. Maintaining the free chlorine in this range helps to prevent chlorine-related issues such as skin irritation or eye discomfort that can occur if the levels are too high.

In addition to disinfection, chlorine also helps to maintain water clarity and overall sanitation of the pool, making it a critical component of pool maintenance. The World Health Organization and the Centers for Disease Control and Prevention endorse this recommendation to promote safe swimming environments.

Maintaining free chlorine within the specified range strikes a balance between efficacy in disinfecting the water and ensuring comfort for swimmers, which is vital for public health in recreational swimming environments.