NSF - National Sanitation Foundation Logo

The Most Trusted Source In Water Filter Certification

NSF – Who They Are

What is NSF International:

NSF International was founded in 1944 as the National Sanitation Foundation by Walter Snyder, Henry Vaughn and Nathan Sinai. This foundation was founded to develop a standard for the sanitation of fountain sodas and other food service products. However, as they grew, their services grew as well which lead them to change their name to NSF International.

NSF International in Water Treatment:

In the water treatment industry, NSF International provides an independent third-party testing and certification service. Meaning, they are an impartial organization that reviews and tests the manufacturing process and the products performance to determine whether it meets their guidelines and standards for that industry. This is a very important certification process for companies in the water treatment industry because it can provide a sense of assurance to the company itself and the customers of that company, because they know the products are tested and certified for performance.

NSF International Certifications in Water Treatment

NSF International’s most common certifications for filtration systems in the water treatment industry are NSF/ANSI 42, 53 and 401. Each of these certifications are different and require separate standards to receive each certification. For instance, NSF/ANSI 42, is given out to water filtration systems that meet the minimum requirements to address aesthetic effects of the water (i.e. taste and odor). The next certification, NSF/ANSI 53, is awarded to filtration systems that meet the minimum requirements for reducing health-related contaminants such as lead, toxoplasma, and cryptosporidium. This certification provides the water filtration with health claims, which is a prestigious title for water filtration systems. NSF/ANSI 401 is provided to water filtration systems that can remove 15 specific “incidental contaminants”. These contaminants can range from prescription drugs to herbicides and other chemical compounds.

When consumers look for a new water filtration system for their house or their sinks, identifying those that have NSF/ANSI certifications should be a high priority.

More info: