In light of the amount of additional information that has been documented related to potential or actual environmental impacts from C&D debris management, the US EPA commissioned an evaluation of C&D debris management in the US to update and expand upon previous analyses to include information on more recent cases of damage and potential impacts and expand the breadth of damages beyond groundwater and surface water impacts. The specific objectives of the evaluation were to: (1) evaluate current state regulations and broad statistics pertaining to C&D debris management in the US; (2) gather information from states regarding areas of concern, if any, with respect to C&D debris management facilities and their impact on human health and the environment; (3) identify and analyze data gaps between information collected as part of the CESQG rule-making and current, readily available information regarding C&D debris management, including (but not limited to) environmental monitoring data and compliance and enforcement information for C&D debris disposal and recycling facilities; and (4) conduct detailed damage case assessments at three sites identified as causing damage in the last 10 years with an expanded set of damage pathways in the analysis (e.g., groundwater, air emissions, and fires).