Access to clean drinking water is a fundamental human necessity, pivotal for sustaining health and well-being. However, the natural sources of water often contain various impurities, including pathogens, chemicals, and organic matter. To ensure that water is safe for consumption, treatment processes are essential. One of the critical aspects of this treatment involves the use of chemicals designed to purify water and eliminate contaminants. This article explores the chemicals commonly used in drinking water treatment, their functions, and their significance in the process.