The statistics on access to potable water, even when pipes come up to your house, are not very encouraging according to this article by Raul Guttierez at IPS:
Acevedo, a chapter coordinator for the UNDP Human Development Report on El Salvador, agreed that this country has met the MDG target on water access. But he added that over the last three years, the country has fallen behind again due to lack of continued public investment, waste of water resources, and population growth.
In addition, cases of corruption were discovered in the Administración Nacional de Acueductos y Alcantarillados (ANDA), El Salvador's main water and sanitation company. Carlos Perla, president of the enterprise from 1994 to 2002, is now in prison on charges of corruption.
Acevedo told IPS that water quality in this Central American country is a "disaster" and added that "no one is recommended to drink the water provided by ANDA or any other provider."
ANDA claims to provide water treatment and distribution services to 4.4 million of El Salvador's 6.5 million people.
Meanwhile, the number of people drinking bottled water is growing, and the companies that sell such water make an estimated 43 million dollars a year, according to UNDP figures. Good business, despite the fact that independent studies have warned that fecal coliforms have even been found in bottled water.(more)
You can read my earlier series on El Salvador's water woes here.