Chilean water utility Aguas Andinas S.A., which serves the Metropolitan region including capital Santiago, is the country's largest sewerage and potable water utility, serving some 1.8mn clients and benefiting about 6mn people. It holds a 42.7% market share. The utility is currently building an underground wastewater pipeline to channel the wastewater that was being dumped into Santiago's Mapocho river. The initiative aims to turn the city into Latin America's first capital to treat 100% of its wastewater. It currently treats 86% of the wastewater it produces. The company also controls water utility Empresa de Servicios Sanitarios de Los Lagos S.A. (Essal), which serves over 600,000 residents in regions Los Lagos (X) and Los Ríos (XIV) in southern Chile. Other subsidiaries include water utilities Aguas Cordillera S.A. and Aguas Manquehue S.A., the latter serving part of the metropolitan region and over 17,000 people with a drinking water coverage of 100% and sewerage coverage of 99.3%; and the country's largest industrial wastewater treatment operator, EcoRiles S.A., which currently operates plants for clients in Chile's agriculture, mining, chemical and wine industries. Aguas Andinas is controlled by Spanish group Agbar through special purpose company Inversiones Aguas Metropolitanas (IAM).