In conclusion, chlorine and alum are two fundamental chemicals employed in water treatment plants to ensure the safety and quality of drinking water. Chlorine acts as a powerful disinfectant, protecting against pathogenic microorganisms, while alum functions as a coagulating agent that enhances water clarity by removing suspended particles. The effective use of these chemicals is vital in the ongoing efforts to deliver safe and reliable drinking water to communities. As technology and research evolve, water treatment facilities continue to adapt and improve their methods, ensuring that public health remains a top priority in water management practices.