The purpose of this Glossary is to provide a single resource containing all of the technical terms used in all NSF Drinking Water Treatment Unit Standards. With all NSF Drinking Water Treatment Unit definitions located in one document, and not in the individual Drinking Water Treatment Unit Standards, greater consistency will be achieved, as changes to a given definition will affect all other Drinking Water Treatment Unit Standards simultaneously once adopted in the Glossary. In addition, the Glossary of Drinking Water Treatment Unit Terminology may serve as a reference tool within the industry.

This Glossary was developed by the NSF Joint Committee on Drinking Water Treatment Units using the consensus process described by the American National Standards Institute.