Environmental Technology Verification (ETV) is a tool designed to help innovative environmental technologies access the market. It consists of the verification, on a voluntary basis, of the functional and environmental performance of a technology by qualified third parties, through tests of controlled quality. The end product is an ETV Statement of Verification published on the ETV website and used in business-to- business relations. This enables technology owners to document the reliability of their claims and differentiate from competitors, and it helps technology purchasers identify innovations that suit their needs.