What is Milli Q Water Laboratory FiltrationMilli Q Water is simply water purified using a Millipore Milli Q lab water system Over the past 30 years there have been several different Milli Q water systems and each can have up to 4 different configurations The term Milli Q water usually comes from a procedure written in a laboratory that had a Milli Q water system and instead of calling for Type 1 water or some other water