Solutions are required to the problem of CCA-treated wood waste disposal or reuse in Canada. This issue will become more important in the coming decades as the volumes of CCA- treated wood currently in use are taken out of service. Incorporation of wastes as furnish in composites is one option and there is already industrial interest in the use of wastes from the "urban forest" in such products. While markets for many of the existing "commodity" composites are buoyant with increases in future demand anticipated and a literature review has indicated considerable research activity in the field, the use of CCA-treated wastes in composites currently presents a lot of questions and not many clear cut answers. A literature review, in combination with information on treated wood waste quantities and a study of market feasibility/consumer acceptance issues, suggests that use of CCA-treated wastes in wood/cement composites might be feasible and could be compatible with existing exterior applications for these products. Apart from the need to understand the practical impact of such wastes on the wood/cement composite process and product, key questions concerning market acceptance and effect on process cost need to be addressed. A feasibility study in cooperation with industry would establish whether specific details of technical viability should be investigated as a next step.