Third Party Certification Standard for Water Filters in US — NSF International
|October 26, 2014||Posted by genachauvins under Safety Standard||
National Sanitation Foundation, now generally referenced as NSF international, was founded by the University of Michigan. It is a non profit organization which provides testing and certification on market products and regulates standards in the sake of public health and safety.
The followings certificates are eligible for standard drinking water treatment units and water filters for controlling the quality of drinking water.
NSF 42 — Drinking Water Treatment Units – Aesthetic Effects
Standard 42 covers both point of use and point of entry treatments which should be specified for eliminating certain aesthetic and non health related contaminants like chlorine, taste and odour, etc from tap water.
NSF 53 — Drinking Water Treatment Units – Health Effects
This standard applies on both point of use and point of entry treatments, where the systems should be designed to remove specific health-contaminants such as lead, organic chemicals and Cryptosporidium, etc.
NSF 58 — Reverse Osmosis Drinking Water Treatment Systems
This is the standard for point of use reverse osmosis(RO) water filtering systems. A pre-filter, RO membrane and post-filter should be included in a standard reverse osmosis water filtering unit. RO treatment should be able to reduce smaller harmful molecules such as nitrates, fluorides, etc, from tap water.
Details of NSF water filter certification could be found at the NSF international website.
You are very much encouraged to get a water filter with NSF certification. Do search for a model which is certified with both NSF42 and NSF53, that would be the minimal requirement of water filter that could get into your house. If you could afford a reverse osmosis water filtering system, make sure it contains NSF58 as well or it should not be priced as expensive as the range of reverse osmosis water filters.
NSF also provide a list of tested water filters for public access.