NSF/ANSI Standard 61 Overview
This information will help explain the purpose, scope, and content
of NSF/ANSI Standard 61.
1. NSF/ANSI Standard 61 Drinking Water System Components - Health
Effects is the standard that establishes minimum health effects
requirements for materials, components, products, or systems that
contact drinking water, drinking water treatment chemicals, or
2.NSF/ANSI Standard 61 (NSF 61) covers many items, including, but
are not limited to:
a. Pipes, fittings and related products
b.Protective barrier materials (coatings, linings, liners, cement,
cement ad-mixtures, etc.)
c.Joining and sealing materials (adhesives, lubricants, elastomers,
d.Process media (activated carbon, sand, ion exchange resin,
regenerated media etc.)
e.Mechanical devices used in treatment and distribution (valves,
pumps, filters, chlorinators, etc.)
f.End-point devices dispensing drinking water (faucets, end-point
control valves, riser tubes, supply stops, etc.)
3.NSF/ANSI Standard 61 does not address all aspects of product use.
The standard is focused and limited to addressing potential health
effects except where specific application and performance standards
are referenced. Some items not addressed by this standard are
performance (such as burst pressure), taste and odor,
microbiological growth support, and electrical safety. Other
standards address these aspects of products, and NSF can provide
testing and certification to these as well.
4.NSF/ANSI Standard 61 is divided into nine Sections and four
Annexes as noted below.
a.Section 1= Purpose, Scope, Limitations, Normative References of
b.Section 2= Definitions of various terms (note there are more
definitions in sections 4 through 9 and Annex A)
c.Section 3= General requirements, required information, review of
formulations, minimum testing batteries, etc.
d. Section 4= Specific requirements for Pipe and related products
like PVC, PE, Cu, Fe, etc. pipe, fittings, and potable water
e.Section 5= Specific requirements for Protective Barrier
Materials/products such as sealers, coatings, paint, primer,
mortar, Portland cements, cement ad-mixtures, etc.
f.Section 6= Specific requirements for Joining and Sealing
Materials/products such as o-rings, gaskets, lubricants, adhesives,
elastomer materials, etc.
g.Section 7= Specific requirements for Process and filtration media
products such as ion exchange, activated carbon, sand, manganese,
aluminum silicates, etc.
h.Section 8= Specific requirements for Mechanical Devices products
such as filters, valves, pumps, chemical generators, chemical
i.Section 9= Specific requirements for Mechanical Plumbing Devices
such as faucets and other end point devices
j.Annex A= Toxicology Review and Evaluation Procedures (risk
assessment and normalization details)
k.Annex B= Detailed product/material evaluation information
(details of test waters for rinse, conditioning, exposure, etc.)
l.Annex C= Acceptable Materials, details of existing types (such as
certain stainless steel materials) and how to add new ones
m.Annex D= Normative drinking water criteria (USEPA, Health Canada,
NSF etc. derived short and long term exposure limits)
n.Annex E= Informative drinking water criteria that are intended to
be used as guidance in the determination of evaluation criteria for
those compounds that do not have normative evaluation criteria
o.Annex F= Contains reduced evaluation criteria for lead in
drinking water. The reduced criteria are currently being held in
abeyance and are due to be in effect on July 1, 2012.
p.Annex G= This annex was developed to establish a lead content
evaluation procedure for use when product is required to meet a
≤0.25% weighted average lead content requirement as exists in
California and Vermont.
For further details about NSF/ANSI Standard 61 and NSF
Internationals testing, auditing, and certification program for
drinking water products please call NSF International +1
734-769-8010 (toll free in the U.S.A. 1-800-NSF-MARK).
We can tell you everything you need to know related to work, cost,
and time estimates for NSF Certification.