NSF International has developed a new compositional standard for products that come in contact with drinking water. The new requirements are incorporated into the NSF/ANSI American National Standard for Drinking Water Products to help protect the public from exposure to lead.
Weighted Average Lead Content
Evaluation Procedure to a 0.25 Percent Lead Requirementallows manufacturers to
demonstrate compliance to recently enacted legislation in California that
limits the weighted average of lead content in plumbing products, which come in
contact with drinking water, to 0.25 percent.
The annex recently was incorporated into NSF/ANSI Standard 61:
Drinking Water System Components -- Health Effects, a standard that includes
procedures to evaluate products that come in contact with drinking water and to
screen out those products that could contribute excessive levels of
contaminants into drinking water. Products covered in the standard include
pipes and related products; protective and barrier materials (including
cements/coatings); joining and sealing materials (including gaskets, adhesives,
lubricants); process media (including carbon, sand, zeolite, ion-exchange
media); mechanical devices (including water meters, in-line valves, filters,
process equipment); mechanical plumbing devices (faucets, drinking fountains,
and components); and potable water materials (non-metallic materials).
inclusion of Annex G is important for manufacturers selling products in
California who must comply with the new lead content requirements, in addition
to the current chemical extraction requirements of NSF/ANSI Standard 61.
California recently passed legislation that requires manufacturers to meet the
0.25 percent weighted average lead content, and other states also are considering
low-lead content legislation. The new lead reduction requirements in California
become effective Jan. 1, 2010.
G establishes a protocol to determine product compliance with the 0.25 percent
maximum weighted average lead content requirement of the California Health and
Safety Code. It is our expectation that states with low lead requirements will
recognize Annex G in their regulations, and this will provide a uniform method
for product evaluation,” explains Pete Greiner, technical manager, NSF Water
Treatment and Distribution Systems Program.
California lead content requirements are not scheduled to go into effect until
2010, NSF is providing product evaluations against the annex now, and updating
NSF 61 listings to indicate compliance with the low lead requirement.
For more information
on Annex G and NSF/ANSI Standard 61, visit www.nsf.org/info/wdsfaq/index.asp.
NSF Develops Standard for Low-lead Plumbing Products
January 20, 2009