NSF Guideline 533 Expands Certification Offering to Include Ingredients Used in Drinking Water Products

17 May 2023

ANN ARBOR, MI - NSF, the leading testing and certification organization in the water industry, is proud to announce the NSF Guideline 533 – Ingredients Used in Drinking Water Products certification program. A listing to NSF Guideline 533 means that a manufacturer’s ingredients have been evaluated for health effects and are safe for use in drinking water products.

NSF has been listing PVC ingredients since the 1980s for PVC pressure pipes but has not expanded to other ingredients than PVC until now. Expanding its PVC ingredient listings will now include ingredients used in other material types, such as CPVC, PE, Nylon, etc., for health effects evaluation only.

It can be challenging for ingredient suppliers to connect with product manufacturers, especially in foreign markets. An NSF listing for manufacturer’s ingredients on NSF’s public website exposes suppliers to hundreds of drinking water product manufacturers worldwide. Additionally, the NSF Guideline 533 certification program provides a listing that allows ingredient manufacturers to market their ingredients as NSF certified, which can help facilitate the listing of their customer's products under NSF/ANSI 14, NSF/ANSI/CAN 61.

Nasin Kashefi, Senior Manager of Residential Water at NSF

NSF Guideline 533 expands NSF's certification offerings to include ingredients used in drinking water products, further strengthening its commitment to ensuring the safety and quality of drinking water products. Certified ingredient manufacturers can use the dedicated NSF mark to prove that their product is safe as reviewed by a third party.

Manufacturers' customers can also enjoy simpler NSF approvals for products made with their ingredients. In most cases, no further testing or evaluation is required, which simplifies the process and reduces the cost. For product manufacturers, using NSF-listed ingredients enables quick sourcing of alternative ingredients and increases formulation flexibility.

Nasin Kashefi, Senior Manager of Residential Water at NSF

For more information on obtaining NSF Guideline 533 certification for your ingredients, please visit the NSF website.

About NSF

NSF is an independent, global services organization dedicated to improving human and planet health by facilitating standards development and providing world-class testing, inspection, certification, advisory services, and digital solutions to the food, water, health sciences, and consumer goods industries. NSF operates in 180 countries and is a World Health Organization (WHO) Collaborating Center on Food Safety, Water Quality, and Medical Device Safety.