Which of the following should be recorded in daily records?

Daily records in aquatic facilities are essential for maintaining safety and ensuring compliance with health regulations. Recording free available chlorine residuals and total chlorine residuals is crucial because it directly affects water quality and swimmer safety. Chlorine levels must be monitored to ensure the water is sanitized properly, helping to prevent the spread of waterborne illnesses.

Consistent documentation of these chlorine residuals allows for immediate action if levels fall outside safe ranges, ensuring that the pool remains a safe environment for visitors. This data is often reviewed by health inspectors and contributes to the overall operational best practices of the facility.

While other options may be important in different contexts—such as tracking equipment usage or costs—free chlorine levels are fundamental to the core responsibilities of maintaining water quality and public health in aquatic settings.