Effective July 1, 2012, the chemical extraction requirements of NSF/ANSI 61 will be tightened considerably
The measurement of lead that leaches from samples collected by NSF (and other accredited certifiers) will be reduced by an average factor of three
Products currently qualifying for NSF/ANSI 61 certification will be tested for lead extraction limits of 5 parts-per-billion instead of the previous 15 ppb.
The new, tightened standard is detailed within the recently-created Annex F of NSF/ANSI 61.
What is currently regarded as NSF/ANSI 61, Annex G will be identified as NSF/ANSI 372 and measure lead content only
Manufacturers who produce product destined for many USA municipalities and government-operated building plumbing systems will need to maintain certification to NSF/ANSI 372 and NSF/ANSI 61.