What is a primary use of chlorine in water treatment?

Chlorine is primarily used in water treatment as a disinfectant. Its primary purpose is to kill or inactivate harmful bacteria, viruses, and other pathogens that may be present in the water supply. By effectively eliminating these microorganisms, chlorine helps ensure that the water is safe for human consumption and reduces the risk of waterborne diseases.

Disinfection is a critical step in the water treatment process, especially for public health situations where safe drinking water is essential. Chlorine is favored for its effectiveness, relatively low cost, and the residual protection it provides; after treatment, a small amount remains in the distribution system to continue guarding against potential contamination until it reaches the consumer.

Other options don't align with the primary function of chlorine in this context. Flavor enhancement, water softening, and increasing turbidity do not relate to the crucial aspect of ensuring water safety and health through disinfection.