 In 2015, Antofagasta plc, which had won the concession for the local water supply in Antofagasta in 2003, sold its shares to the publicly owned Colombian multi-utility Empresas Públicas de Medellín (EPM)for USD 965 million.Responsibility for sector policy in Chile is vested primarily in the Ministry of Public Works, which grants concessions and promotes rural water supply and sanitation through its Department of Sanitation Programs.The responsibility for regulation is shared between the Superintendencia de Servicios Sanitarios SISS, the economic regulator in urban areas, and the Ministry of Health which controls drinking water quality standards in both urban and rural areas.