Athens Water Supply and Sewerage Company S. A., together with its subsidiaries, engages in the water supply and refinement, and sewerage and waste management activities in Greece. The company is involved in the analysis, construction, establishment, operation, exploitation, maintenance, expansion, and modernization/renewal of water supply and sewerage installation and networks.

It operates a water distribution network of 14,000 kilometers; four units of water refining with a total daily capacity of 1.8 million cubic water meters; a sewerage network of 9,500 kilometers; and three waste management centers in Psitalia, Metamorphosis, and Thriasio. The company also engages in irrigation and rain water collection activities. In addition, it produces electric energy through hydro, solar, biogas, natural gas, and thermal energy sources.

Athens Water Supply and Sewerage Company S. A. was founded in 1980 and is headquartered in Athens, Greece. Athens Water Supply and Sewerage Company S.

A. operates as a subsidiary of Hellenic Corporation of Assets & Participations S. A. Address: 156 Oropou Street, Athens, Greece, 11146