Which of the following hazards is associated with the use of chlorine in water treatment?

The use of chlorine in water treatment is primarily associated with its corrosiveness. Chlorine, when dissolved in water, can produce hypochlorous acid, which can corrode certain materials such as metals and can lead to degradation of pipes and other infrastructure over time. This is a significant concern in water distribution systems, as the corrosion can result in leaks or even structural failures, leading to water quality issues or service disruptions.

Corrosiveness is an important hazard to recognize in the context of water treatment, particularly in relation to the materials used for the water delivery infrastructure. Proper materials selection and maintenance are critical to mitigating the risks associated with chlorine's corrosive nature.

While chlorine does possess other hazards, such as reactivity with certain metals and its capability to produce toxic gaseous byproducts under specific conditions, the most widely acknowledged and noted hazard pertinent to chlorine's use in water treatment is its corrosive properties. This explains why the focus is primarily on corrosiveness when discussing hazards with chlorine in water treatment processes.