Proposed revision to NSF/ANSI 53: Drinking Water Treatment Units – Health Effects (53i125r3) and NSF/ANSI 58: Reverse Osmosis Drinking Water Treatment Systems (58i90r3).
The proposed revision will add additional PFAS compounds to the chemical reduction claims under NSF/ANSI 53 and NSF/ANSI 58. Revision 2 addressed two comments received in the r1 ballot (7/7/20), which requested successful completion of validation testing, which had taken place. Revision 3 addresses three negative, two affirmative, and two non-voter comments received in the r2 ballot (3/9/22). It clarifies the two test methods for PFAS contaminant reduction claims (total PFAS and individual contaminants), corrects total PFAS for influent from 0.00205 to 0.00216 mg/L, and corrects PFHxS from 200 ppt to 300 ppt and PFNA from 40 ppt to 50 ppt. |
