What is NSF/ANSI Certification

You would get noticed that while choosing water filter for your refrigerator, most of products of different brand, including generic and the replacement, state that they are certified with NSF/ANSI. You may guess that it would be a type of provident of quality but never wonder what that it really means. And in this article, we will show you what NSF/ANSI certification means, and why it is so important for refrigerator water filter.

What is NSF/ANSI

According to NSF organization, NSF/ANSI Standard 61 pertains to products in contact with potable or drinking water in the United States. This is a performance-based standard that evaluates the number of contaminants that leach from the products into drinking water, rather than setting prescriptive limits on content.

The difference Among NSF/ANSI 42,53 and 401

Generally, most water filters of refrigerator brands like Frigidaire gains the NSF/ANSI 42, 53 and 401 certifications and most of the third-party brand only pass NSF/ANSI 42. What is the difference? Is NSF/ANSI 42 enough for refrigerator water filter?


This standard establishes minimum requirements for systems designed to reduce non-health-related contaminants including chlorine, taste and odor, chloramine, particulate, iron, manganese, zinc and total dissolved solids (TDS)


This standard establishes minimum requirements for systems designed to reduce specific health-related contaminants. This standard offers over 50 contaminant reduction claims. Some of the most popular include: lead, Cryptosporidium, VOCs and chromium.


This standard addresses the ability of a water treatment device to remove up to 15 individual contaminants which have been identified in published studies as occurring in drinking water. Some of the most popular categories include prescription drugs, over-the-counter medications, herbicides, pesticides and chemical compounds. The contaminants covered in NSF/ANSI 401 have been detected in drinking water supplies at trace levels and can affect some consumers’ perception of drinking water quality

Why the NSF/ANSI Certification is Significant?

  • The significance of NSF/ANSI includes getting certified by an agency that holds importance and is trusted by people. It proves that the water purifier has gone through certain tests to gain the certification that it is safe, and clean water for drinking.
  • Another significance of certification is that the standards and procedure of the certification are available online so any person can go through that to get an idea regarding how safe a certain purifier’s water is when it comes to clean drinking water.

If a brand has received certification, it means that it has gotten through the process of assessment and following certain requirements which one can find easily and know how clean the water is.

Buy Water Filter from Mighty Filters

As you can see that, the factory OEM generic water filter like Everydrop water filter, Frigidaire water filter are certified with NSF/ANSI 42, 53 and 401, but it’s very expensive and hard to afford. For example, the EveryDrop filter 1 cost about $59.99 each for 6-month use, if the lifetime of your Whirlpool refrigerator is about 6 years, you would spend about $ 720 for it, worth a new refrigetor. And if you want to choose a replacement filter from Amazon or Walmart which only certified with NSF/ANSI 42, although they are very cheap, cost only quarter comparing to the original one, you may be worried about the quality. And in total, that’s why you should trust and choose, which offer the generic water filters with quantity limited huge discounts. Shop with confidence.

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