NSF/ANSI 53-2018: Drinking Water Treatment Units – Health Effects

***Update: This standard has been revised. NSF/ANSI 53-2019: Drinking Water Treatment Units – Health Effects is available on the ANSI Webstore. You can read more about its changes in our post NSF/ANSI 53-2019: Drinking Water Treatment Units – Health Effects.

Glass of water being filled with water that's treated by the requirements set by NSF/ANSI 53 2018

Reliable access to clean drinking water is a matter of public health. Among a multitude of processes that assure the delivery of potable water, units that reduce health-related contaminants are one of the final bulwarks that protect the public from harm.

Numerous American National Standards developed by NSF International, an ANSI-accredited standards developing organization, address the treatment of water systems. NSF/ANSI 53-2018: Drinking Water Treatment Units – Health Effects deals with health-related contaminants of drinking water treatment units.

Specifically, this standard covers materials, design and construction, and performance for point-of-use and point-of-entry drinking water treatment systems designed to reduce specific health-related contaminants in water supplies (public or private). These systems are intended to reduce specific substances, whether chemical or particulate, that are considered established or potential health hazards.

In addition to providing these guidelines, NSF/ANSI 53-2018 specifies the minimum product literature and labeling information for manufacturers to supply to authorized representatives and system owners. It also includes the minimum service-related obligations for manufacturers to extend to system owners.

NSF/ANSI 53-2018 revises the previous edition of the same standard for drinking water treatment units. As part of the periodic revision process, the current version has undergone the following changes:

  • There is now an asbestos reduction protocol for batch treatment systems in Section 7.3.1, “Asbestos reduction claims.”
  • The standard clarifies language on systems that include components or functions covered under other NSF standards.
  • This revision clarifies “product literature requirements” under Section 8.3, “Replacement components.”
  • For drinking water treatment devices that use activated carbon absorption, this edition of the standard contains a performance reduction claim for perfluorocctanoic acid (PFOA) and perfluoroctane sulfonate (PFOS).

If you are interested in learning more about the changes made to the previous edition of this standard, please refer to: NSF/ANSI 53-2017: Drinking Water Treatment Units—Health Effects.

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