Acea SpA operates as a holding company, which engages in the management and development of water, energy, and environmental services. It operates through the following business segments: Water, Environment, Energy Infrastructures, Commercial and Trading, Overseas, and Engineering and Services. The Water segment provides integrated water services in Italy. The Environment segment involves in sludge management as well as in treatment, recycling, waste-to-energy, and waste disposal activities. The Energy Infrastructures segment engages in the distribution and generation of electricity, public lighting, and industrial energy efficiency measures. The Overseas segment focuses on the development initiative outside of Italy. The Commercial and Trading segment specializes in energy management, the sale of electricity and gas, and energy efficiency for domestic clients. The Engineering and Services segment provides laboratory analysis and engineering and internal consultancies. The company was founded in 1909 and is headquartered in Rome, Italy.