The report describes an emission data base compiled from test reports for Municipal Waste Combustors (MWCs) in the U.S., Canada, Japan, and Europe. These emission data are presented in a format that allows comparison and analysis in order to identify, to the extent of available data, the emission levels of organic compounds (including polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated dibenzofuran (PCDF)), metals, acid gases, and criteria pollutants that have been achieved from MWC's on a commercial scale. The available operating conditions and control techniques associated with the lowest emission levels for each pollutant of concern identified.