Chlorine is typically added to water systems to control what?

Chlorine is added to water systems primarily for its effectiveness as a disinfectant, specifically to control bacteria and other harmful microorganisms. By using chlorine, water treatment facilities can significantly reduce the risk of waterborne diseases, ensuring that the water supplied to the public is safe for consumption. Chlorine works by penetrating microbial cells and disrupting their functionality, thereby neutralizing the pathogens present in the water.

While chlorine can influence other water quality parameters indirectly, such as smell or taste, its primary and most crucial role remains the disinfection of water to eliminate bacteria. This action helps maintain the safety and quality of drinking water in distribution systems.