What is NSF

As indicated by the map’s regions in green, compliance to Standard 61 is required by regulation or policy in 43 of 50 US States and 11 of 13 Canadian Provinces/Territories. With over 1,200 companies and 26,000 products certified to NSF Standard 61, it is the premier standard most recognized and respected by water utilities and regulators across North America, and around the globe.

NSF Standards
NSF has developed over 50 voluntary American National Standards under the scope of public health and safety. NSF/ANSI Standards are developed through involvement of those who are directly and materially affected by the scope of the standard. The process ensures balanced input from industry representatives, public health/regulatory officials, and users/consumer representatives.  NSF is accredited by the American National Standards Institute (ANSI) to develop American National Standards. ANSI's accreditation verifies that NSF develops standards in a manner to ensure openness and due process allowing for equity and fair play.  NSF/ANSI Standards are constantly being reviewed and revised to ensure that the Standards are up to date and technically sound.

Water Treatment and Distribution Systems
The NSF Water Treatment and Distribution Systems Program is responsible for the Certification of drinking water treatment chemicals and drinking water system components to ensure that these products do not contribute contaminants to drinking water that could cause adverse health effects.

NSF/ANSI Standard 60:
Drinking Water Treatment Chemicals -- Health Effects is the nationally recognized health effects standard for chemicals which are used to treat drinking water.

NSF/ANSI Standard 61:
Drinking Water System Components -- Health Effects is the nationally recognized health effects standard for all devices, components and materials which contact drinking water.

The above information is from www.nsf.org