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NSF/ANSI 61 overview

What is NSF/ANSI Standard 61?

NSF/ANSI 61 is a set of national standards that apply to drinking/potable water treatment. It sets out the rigorous requirements for the control of components that come into contact with drinking water or products used in the production of drinking water. It establishes the strict minimum health-effect requirements for the chemical derivatives such as impurities and contaminants which are incidentally transmitted into potable/drinking water from the elements of potable water systems. This includes components and materials used in them. The tests vary from simple cold water at various pH levels to the more demanding chemical approval.

NSF 61 was established by the National Sanitation Foundation (NSF), a worldwide independent public health and environmental organisation, and the American National Standards Institute (ANSI), which supervises the consensus for manufacturing and procedures.

In short, NSF/ANSI 61 is designed to describe particular products or materials that come into contact with potable water, potable water treatment chemicals, or both. However, this standard does not determine performance, odour, taste, or microbial growth support demands for potable water drinking system components, materials, or products.

All it does is ensure that drinking (potable) water is clean, and safe, and covers almost all components used in municipal water systems.

Below listed are some aspects covered by the standard:

  • Process media – ion exchange resins, filter elements
  • Plumbing equipment – drinking fountains, water taps
  • Mechanical appliances – treatment products, filters, valves, water meters
  • Pipes – hoses, fittings
  • Joining and sealing materials – gaskets, lubricants, adhesives
  • Non-metallic potable water materials
  • Protective barrier materials – coatings, paints


Components and products certified and marked with NSF symbol indicate that it has been proven safe for contact with drinking water products.

If you require further information regarding our range of products and/or services, please contact a member of the team.

M Barnwell Services endeavour to make sure that all content is correct. Manufacturing partners assisted with the creation of this page. E & OE. For more detailed information, visit the NSF 61 organisation website.