Resource Recycling Systems (RRS) was asked to research several questions generated by the Recycling Steering Committee (RSC) during the framework and scenario review and evaluation process. This is the fifth in a series of memos responding to the RSC’s questions. In this memo, RRS presents the results of research to determine if Extended Producer Responsibility for packaging and printed paper (EPR for PPP) impacts contamination rates in residential recycling programs. To address this question, the RRS team studied recycling program contamination rates in Canadian provinces with EPR for PPP, and in neighboring provinces and U.S. states that do not have EPR policy in place. The data available did not lead to any conclusive assessment as to whether EPR for PPP impacts the rate of contamination in recycling program.