Home > Public Area > Standards
NSF's standards are maintained using ANSI's "continuous maintenance" option, meaning that they are revised or reaffirmed at least once every four years. For further detail, see NSF's standards development and maintenance policies.
An issue document can be completed by any stakeholder to suggest a modification to an existing standard. The procedure for completing the issue document is available here. Issue documents can be returned:
- By email to to standards@nsf.org
- By fax to 734.827.6108
- By mail to:
Standards Department
NSF International
789 Dixboro Road
Ann Arbor, Michigan 48105