ACEA S.p.A., together with its subsidiaries, operates as a multi-utility company in Italy. The company operates in four segments: Environment, Energy, Water, and Networks. The Environment segment operates in the urban management of environmental services. This segment runs waste-to-energy and composting plants, as well as produces energy from waste. The Energy segment runs hydroelectric and thermo electric plants in Lazio, Umbria, and Abruzzo; and supplies natural gas. This segment serves families and companies. The Water segment provides drinking water distribution services comprising collection, abstraction, retail, and wholesale. This segment supplies water to approximately 8.5 million customers; and manages integrated water service in Rome and Frosinone, as well as in other parts of Lazio, Tuscany, Umbria, and Campania. In addition, this segment manages the waste water treatment system and pumping stations that serve the network and sewage trunk lines. The Networks segment distributes approximately 11 TWh of electric energy to 1.6 million people; manages public and artistic lighting; and owns photovoltaic power plants. The company was founded in 1909 and is based in Rome, Italy.