Which is a primary purpose of using chlorine in water treatment?

The primary purpose of using chlorine in water treatment is to disinfect water. Chlorine is a powerful oxidizing agent that effectively kills bacteria, viruses, and other microorganisms that can be harmful to human health. By introducing chlorine into the water supply, water treatment facilities can ensure that the water meets safety standards for consumption and reduces the risk of waterborne diseases.

Disinfection is a critical step in the water treatment process because it helps maintain public health by making sure that pathogens are effectively destroyed before the water reaches consumers. The use of chlorine for disinfection has been a longstanding practice due to its effectiveness, relatively low cost, and residual properties, which help protect the water supply from recontamination as it travels through distribution systems.

While improving taste and odor, enhancing water color, and oxidizing metals are all important aspects of water treatment, the primary and most vital function of chlorine is its role in disinfection. This treatment ensures that the water remains safe for drinking and other uses, thus protecting community health.