IAPMO R&T is proceeding with adopting the 2019 version of NSF/ANSI 53, Drinking Water Treatment Units - Health Effects, and the 2020 version of NSF/ANSI 58,Reverse Osmosis Drinking Water Treatment Systems. Due to changes in the acceptance criteria, this may impact current certifications or any testing that has not started prior to the adoption of the standard on March 8, 2021.
There are two main items in these new versions that may have an impact:
- The new lead reduction acceptance level will change from 10 ppb to 5ppb. This affects both 53 and 58 listings since the acceptance criteria was changed in both standards.
- Language that prevents a single failing point during NSF/ANSI 58 performance testing. This affects all performance testing conducted within NSF/ANSI 58.
You will be notified during your 2021 renewal to comply with the new lead reduction requirement level by your 2022 renewal date. You will have until your 2023 renewal to comply with the removal of the single failing point allowance in NSF/ANSI 58.
Please contact your project manager if you have any questions or concerns on these standard updates.