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About this guide In response to the Flint water crisis, there has been an unprecedented demand for information on home water filters certified to reduce the levels of lead in the municipal water serving residents and businesses in Flint, Michigan. NSF International has received many requests for information on which filters are certified for lead reduction and any limitations in the use of these filters. NSF International has created this guide that lists all NSF-certified filters for lead reduction in drinking water. This guide also explains the NSF standards and the process by which NSF International verifies a filter’s ability to reduce lead in drinking water. About NSF International and Its Role Certifying Water Filters Who is NSF International? NSF International is an independent, not-for-profit organization that writes standards, and tests and certifies products for the food, water and consumer goods industries to minimize adverse health effects and protect the environment. Founded in 1944 at the University of Michigan School of Public Health (as the National Sanitation Foundation), NSF International is now an independent organization that is committed to protecting human health and safety.

NSF International’s standards and product certifications are relied on extensively by regulators, manufacturers, retailers, consumers and public health officials. Additionally, NSF International is a World Health Organization/Pan American Health Organization Collaborating Center on Food Safety, Water Quality and Indoor Environment. How are NSF standards developed? NSF International uses a consensus-based process to develop national standards which means that regulators (including the U.S. EPA), consumers, academia and industry are involved in developing standards to ensure they are protective of public health. NSF International is accredited by the American National Standards Institute (ANSI) for standards development and product certification. NSF International drinking water certification programs are accredited by ANSI to ensure objectivity and transparency.

Additionally, NSF standards receive public health ratification from its Council of Public Health Consultants which is comprised of representatives from government, academia and public health. NSF International has developed over 90 consensus national standards. What are NSF's water filtration standards? In the 1970s, NSF International led the development of the American National Standards for materials and products that treat or come in contact with drinking water, including water filters used in homes and businesses. NSF/ANSI Standard 53 for Drinking Water Treatment Units is the nationally recognized standard for evaluating and certifying drinking water treatment systems for the reduction of contaminants from drinking water.

NSF/ANSI Standard 58 is the national recognized standard for Water Treatment Systems that use reverse osmosis technology. Runaway Road Adventure Patch Fr more. Water filters are tested and certified to NSF/ANSI 53 and 58 to ensure they reduce contaminants, including lead, per the requirements of the standards. How does NSF test water filtration products? Manufacturers voluntarily submit products to NSF International for independent testing and certification to NSF/ANSI Standard 53 and 58. NSF International performs a thorough product review and evaluation, and conducts rigorous product testing to verify that the product meets the requirements of the standard. This product testing and evaluation is carried out in NSF’s ISO 17025-accredited laboratories located in Ann Arbor, Michigan. NSF certified water filters for lead reduction have been evaluated in a study using water that contains 150 parts per billion (ppb) of lead.