 The program also included a large-scale public information campaign and an increase in water tariffs.The impact of the program is difficult to assess, since available figures on water consumption are difficult to compare over the years, because it is not clear whether they include water losses or not and whether they refer only to residential consumption or total consumption.Manuel Camacho Solís, the Head of Government of the Federal District from 1988 to 1997 who was appointed by President Carlos Salinas (PRI), led the process of private sector participation in water supply in Mexico City in the early 1990s.