Q&A: Water Treatment Chemicals

  • Open Where can I find NSF listed products?

    NSF certified products can be found in our online listings.

  • Open What ensures the product consistently meets these requirements?

    For products listed for potable water applications, NSF performs at least two unannounced audits of each production facility annually. During the audit, we verify the quality control tests being done by the manufacturer and that there are no modifications to the product formulation and processing. In addition, we collect samples for laboratory retesting of each product family on an annual basis.

  • Open Whom can I contact for questions?

    If you have questions about the testing and certification of any NSF certified product, contact our Consumer Affairs Hotline at 800.673.8010 or our Regulatory Affairs Hotline at 877.867.3435, or email info@nsf.org.

  • Open Who is NSF?

    Founded in 1944, NSF International is committed to protecting and improving human health and the environment on a global scale. NSF International is a global independent organization that provides standards development, product certification, testing, auditing, education and risk management for public health and the environment. Manufacturers, regulators and consumers alike look to NSF International for the development of public health standards and certification that help protect the world’s food, water, health and consumer products.

    In 1990, the U.S. EPA replaced its own drinking water product advisory program with NSF standards, including NSF/ANSI 61, for all materials and products that treat or come in contact with drinking water. Today, most plumbing codes require certification to NSF standards for pipes and plumbing components in commercial and residential buildings.

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