Athens Water Supply & Sewage Co. SA engages in water supply and refinement, as well as sewerage services and waste treatment. The firm is involved in the analysis, construction, establishment, operation, exploitation, maintenance, expansion, and modernization and renewal of water supply and sewerage installation and networks. It also uses water supply and sewage networks in addition to the development of telecommunication and energy activities. The company was founded in 1980 and is headquartered in Athens, Greece.