The Italian legislation (D.Lgs. n. 152/2006) defines waste as any substance or object that the holder discards, either by choice or because he is obliged by law to do so.
The detailed list of wastes, and their classification, are established by law and periodically updated. The total production of waste in Italy is around 174 million tons per year (ISPRA 2020), corresponding to approximately 2,900 kilograms per inhabitant per year.
Waste can be classified in two ways, i.e. by origin or by hazard: