WREGIS - Western Renewable Energy Generation Information System

The Western Renewable Energy Generation Information System or WREGIS, a renewable energy registry and tracking system for the Western Interconnection, successfully went online on June 25, 2007. WREGIS is housed at the Western Electricity Coordinating Council (WECC) in Salt Lake City, UT, and the WREGIS Staff at WECC continuously processes applications for Account Holder registration.

WREGIS was developed in response to policies set by the California Legislature and the Western Governors' Association (WGA) to develop and implement a system tracking renewable energy generation. This system will help ensure the credibility of the "green" value of renewable electricity and facilitate the growth of renewable energy throughout the Western U.S.

Account Holders include load serving entities, balancing authorities, generators, marketers, regulators and others.

Please visit WREGIS for more information.


The California Legislature has charged the Energy Commission with developing a tracking system for implementing California's Renewable Portfolio Standard. On October 8, 2003, the Energy Commission adopted the Renewable Portfolio Standard: Decision on Phase 2 Implementation Issues (publication number 500-03-049F), which recommends that the Energy Commission staff work with the WGA to develop a regional certificates-based renewable energy tracking system.

In June 2002, Western Governors adopted an amendment to the WGA resolution, Western States' Energy Policy Roadmap, supporting the creation of an independent regional tracking system to provide the data needed to substantiate and support the verification and tracking of renewable energy generation. The resolution included a management directive charging WGA to bring Western stakeholders together to help define the institutional structure, design operating guidelines, and identify information needed to support tracking of and accounting for renewable energy generation and registering Renewable Energy Certificates in the Western Interconnection.