Chlorine is often used in water systems because of its ability to do what?

Chlorine is widely utilized in water treatment systems primarily due to its powerful disinfectant properties, which enable it to effectively kill harmful bacteria, viruses, and other pathogens that can contaminate drinking water. This process is vital in ensuring the safety of public water supplies and preventing waterborne diseases. Chlorine works by attacking the cellular structure of microorganisms, leading to their destruction and significantly reducing the risk of infection for individuals consuming the treated water.

While chlorine may have effects on the water's taste and may interact with other substances affecting pH, its primary and most critical role in water systems is as a disinfectant, making it an essential component in maintaining water quality and public health. Thus, its ability to kill harmful bacteria is the primary reason for its use in water treatment.