New HBN research reveals that legacy toxic hazards are being reintroduced into our homes, schools and offices in recycled vinyl content that is routinely added to floors and other building products. Legacy substances used in PVC products, like lead, cadmium, and phthalates, are turning up in new products through the use of cheap recycled content. Funding for research on post-consumer PVC feedstock was provided by StopWaste and donors to the Healthy Building Network (HBN). It was conducted using an evaluative framework to optimize recycling developed by StopWaste, the San Francisco Department of the Environment, and HBN. This briefing paper on post-consumer recycled PVC is a prequel to a forthcoming white paper by this new collaboration.