According to PALYJA, the service coverage ratio increased substantially from 34% (1998) to 65% (2010) in its western half of the concession. According to data by the Jakarta Water Supply Regulatory Body, access in the eastern half of the city served by PTJ increased from about 57% in 1998 to about 67% in 2004 but stagnated afterwards. However, other sources cite much lower access figures for piped water supply to houses, excluding access provided through public hydrants: one study estimated access as low as 25% in 2005, while another estimated it to be as low as 18.5% in 2011. Those without access to piped water get water mostly from wells that are often salty and unsanitary. As of 2017, according to the Ministry of Energy and Mineral Resources, Jakarta had a crisis over clean water.