Two private companies, PALYJA and Aetra, provide piped water in the western and eastern half of Jakarta respectively under 25-year concession contracts signed in 1998. A public asset holding company called PAM Jaya owns the infrastructure. Eighty per cent of the water distributed in Jakarta comes through the West Tarum Canal system from Jatiluhur reservoir on the Citarum River,  southeast of the city. The water supply was privatised by President Suharto in 1998 to the French company Suez Environnement and the British company Thames Water International. Both companies subsequently sold their concessions to Indonesian companies. Customer growth in the first seven years of the concessions had been lower than before, possibly because of substantial inflation-adjusted tariff increases during this period. In 2005, tariffs were frozen, leading the private water companies to cut down on investments.