Purified Water is Water that has been mechanically filtered or processed to remove impurities and make it suitable for use in several commercial and residential applications. Distilled water has been a common form of purified Water but Water is more frequently purified by other processes including deionization, reverse osmosis, carbon filtration, microfiltration, ultrafiltration, UV Oxidation, and EDI.
Combinations of a number of these processes have come into use to produce water of such high purity that its trace contaminants are measured in parts per billion (ppb) ot parts per trillion (ppt) purified water has many uses, largely in the production of medications in science and engineering laboratories and industries, and is produced in a range of purities. It can be produced on site for immediate use or purchased in containers. Purified Water in colloquial English can also refer to water which has been treated to neutralize but not necessarily remove contaminants considered harmful to humans or animals.
Water Purification and Filtration 