This comprehensive literature review from EREF examines the current state of Extended Producer Responsibility (EPR) policies across the U.S., Canada, and Europe. The report identifies the materials commonly targeted, policy structures, and existing efforts to evaluate effectiveness. A key finding: despite growing interest in EPR, there is not yet sufficient standardized data to determine whether these programs are meeting circularity goals. This resource helps waste industry professionals understand the evolving EPR landscape, highlighting critical gaps in measurement and opportunities for operational and policy improvement.