The NSF/ANSI 61 certificate is the standard for the production of drinking water dispensers manufactured abroad. Drinking water system components that are NSF certified are used to ensure that no harmful contaminants enter the drinking water. NSF/ANSI 61 is an American, national standard that relates to water treatment. According to the NSF website, they are subject to strict requirements and controls from, for example, water dispensers and drinking fountains that come into contact with water. The NSF standard confirms that the systems awarded with it are made from safe materials and therefore no harmful substances are released into drinking water.