This book highlights the need for precise estimation of sodium benzoate in soft drinks. Firstly, it addresses the health concerns related to the excessive intake of sodium benzoate. Scientific studies have associated high levels of sodium benzoate consumption with adverse effects such as allergic reactions, hyperactivity in children, and possible DNA damage. Thus, monitoring and controlling the concentration of this preservative in soft drinks is paramount. Water quality parameters play a crucial role in assessing the safety, purity, and suitability of drinking water. This abstract highlights the significance of specific parameters, namely dissolved oxygen (DO) and chemical oxygen demand (COD), pH in evaluating the quality of drinking water and ensuring its compliance with health and environmental standards and also addresses the potential health risks associated with contaminated drinking water. Pathogens, such as bacteria E.coli/Coliform can pose serious health threats if present in drinking water. Measuring water quality parameters enables the identification and monitoring of these contaminants, helping to prevent waterborne diseases and protect public health.