The impact of plastics in municipal waste incineration was evaluated in this study. Switzerland has probably the most extensive experience now from plastic waste incineration because no landfill is admitted and plastics have to be recycled either by material or by energy recovery. It is observed that the incineration of PVC, including its additives, in a municipal incinerator is nowadays without impact on the environment. The equipment of modern incinerators is indeed able to avoid formation and/or emissions of acids and other pollutants.. The equipments incinerators are also able to incinerate the high caloric input that represents a high content of plastic waste without reduction of the flux of waste treated.