Introduction Pharmaceutical-grade purified water, often referred to as Purified Water (PW), is a critical component in pharmaceutical manufacturing and must meet stringent quality standards set by United States Pharmacopeia (USP) or European Pharmacopoeia (Ph. Eur.) or Indian Pharmacopeia. Purified water serves as a critical raw material for drug formulation, cleaning, and various laboratory applications. To ensure the safety and efficacy of pharmaceutical products, specific quality attributes of purified water must be controlled and monitored. In this blog, we will explore