Water Treatment

Certification of water treatment products helps end users attain a cleaner, safer water supply.

NSF International offers testing and certification services for many water treatment products, including filtration media, equipment and chemicals. Provide proof that your products comply with the highest international standards.

Our Services

Water Treatment and Filtration Systems

Test or certify your water treatment and filtration systems, whether they are designed for municipal, point-of-use or point-of-entry applications.

Filtration Media

Test or certify your water filtration media to meet public health and regulatory requirements.

Drinking Water Treatment Chemicals

Certify your drinking water treatment chemicals to meet regulatory requirements around the world.

Regional Certification and Approvals

NSF helps manufacturers of water treatment, distribution, plumbing and residential water filtration products gain access to global markets.

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News and Events

Plumbing Standard Revisions Tighten Lead Leaching Criteria in Drinking Water

September 22, 2020

Joint committee governing NSF/ANSI/CAN 61 lowers maximum allowable limits of leached lead from plumbing endpoint devices

Drinking Water Treatment Units Must Now Meet Stricter Requirements for Lead Reduction Certification

February 6, 2020

Joint committee governing NSF/ANSI 53 and NSF/ANSI 58 lowers the maximum allowable lead in filtered water from 10 ppb to 5 ppb

Major Revision to Drinking Water Treatment Standard Allows UV-LED Technology to Treat Microorganisms

November 14, 2019

NSF International publishes new criteria for UV technology and test methods as part of NSF/ANSI 55: the American National Standard for ultraviolet microbiological water treatment systems

Concerned About Lead in Your Drinking Water? Choose a Filter Certified to Reduce Lead

November 7, 2019

NSF International urges the use of drinking water treatment and filtration devices that are independently tested and certified to reduce lead

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