The Milli-Q water purification system uses tap water to supply constant-quality Type II (pure) and Type I (ultrapure) water from a single water production unit. The system combines Elix technology with the Milli-Q system to provide direct control over water quality throughout the entire purification process. Ion-exchange resins are continuously regenerated by a weak electric current, resulting in low maintenance requirements and well-controlled running costs. The system produces pure and/or ultrapure water for needs ranging from 60 to 300 L/day. Separate Points-of-Delivery (PODs), dedicated either to ultrapure water (Q-POD) or pure water (E-POD), ensure convenient delivery at a flow rate adjustable from drop-by-drop to 2 L/min.