The California ISO manages the flow of electricity across high-voltage, long-distance power lines, operates a competitive wholesale energy market, and oversees transmission planning.
Stakeholders are essential to the California energy market and the ISO is committed to providing centralized access to transparent information.
The ISO provides open and non-discriminatory access to the transmission grid, supported by a competitive energy market for resources generating one megawatt or more.
Procedures, reports and reference information pertinent to grid and market operations.
Research legal policies, notices as well as ISO contracts and agreements. Business practice manuals and operating procedures are also found here.
Update to the May 19th, 2026, Board Approved 2025-2026 Transmission Plan was approved by the ISO Board of Governors on August 27th.