About Us

The non-profit American Carbon Registry (ACR), an enterprise of Winrock International, is a leading carbon offset program with strong standards for environmental integrity and transparency.

Founded in 1996, ACR has over fifteen years of unparalleled experience in development of rigorous, science-based carbon offset standards and methodologies as well as operational experience in the oversight of high quality offset project verification, registration, offset issuance, serialization and transparent on-line transaction and retirement reporting.

In addition to its voluntary carbon market activities, ACR is an approved Offset Project Registry (OPR) for the California Cap-and-Trade Program. As an OPR, ACR works with the state regulatory agency to oversee the registration and issuance of compliance-eligible Registry Offset Credits.

As the first private greenhouse gas registry in the world, ACR has set the bar for offset quality that is the market standard today and continues to lead carbon market innovation.