What is the purpose of using chemical disinfectants in water treatment?

The primary purpose of using chemical disinfectants in water treatment is to eliminate pathogens, which include bacteria, viruses, and protozoa that could pose health risks to humans. Disinfection helps ensure that drinking water is safe by effectively reducing or destroying the harmful microorganisms that can lead to waterborne diseases. This component of water treatment is crucial in preventing outbreaks of illnesses such as cholera, typhoid fever, and gastrointestinal infections.

While improving taste, increasing pH levels, and enhancing clarity may have benefits in water treatment, they are not the main objectives of using chemical disinfectants. The focus on pathogen elimination is essential for public health safety, making it the correct and most important answer in this context.