Fresenius Water System Practice Exam 2025 - Free Water System Practice Questions and Study Guide

The safe range for total chlorine levels in water is critical for ensuring water safety and maintaining public health. A total chlorine level of 0.10 mg/l reflects a concentration that is generally considered safe for drinking water and other water applications. This level helps to effectively kill or inhibit the growth of harmful microorganisms while minimizing the potential for negative health effects associated with higher chlorine concentrations.

Higher levels of total chlorine can lead to various issues, including taste and odor problems, potential formation of harmful disinfection byproducts, and possible irritation to skin and mucous membranes in sensitive individuals. Therefore, maintaining total chlorine levels around 0.10 mg/l is essential for providing safe and palatable water. This level supports effective disinfection while being mindful of the health impacts on consumers.

The other options, while they represent detectable levels of chlorine, exceed ideal concentrations for safety and can raise concerns regarding the adverse effects mentioned earlier.