Thermal distillation—utilizing either single or multi-effect technology—remains the industry-standard method for Water for Injection (WFI) generation. While the distillation process typically uses Purified Water (PW) as a source, the feed water must adhere to strict chemical and microbiological specifications. To ensure optimal system performance and product safety, AWMS systems are engineered to utilize feed water that consistently meets or exceeds USP Purified Water quality requirements.