Certification of Chemicals & Products for Purity
ANSI/NSF Stabndard 60 & 61

Owners and operators of public water systems need to ensure that chemicals used in treating public water supplies, and other products or coatings in contact with drinking water do not inadvertently cause contamination. In order to ensure such safety, it is required that such treatment chemicals and products meet purity standards and are manufactured under appropriate levels of cleanliness.

These standards are commonly known as the ANSI/NSF Standards 60 and 61. Chemical purity is addressed by Standard 60. The purity of products in contact with water is addressed by Standard 61. This certification of chemicals and products is required by government drinking water programs that implement the Safe Drinking Water Act.

Currently there are various entities providing the certification of treatment chemicals and products in accordance with the protocol of Standards 60/61; including NSF International, Underwriters Laboratory (UL), and the Water Quality Association (WQA).
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