The goal of the project is to analyze the effect of the hydrological policy on the technological change of infrastructure for the treatment of sewage waters in Distrito Federal on the lapse time from 1970 to 2010, specifically on the Cerro de la Estrella plant. On this case, the hypothesis that environmental regulations generate positive effects on the technological development and favour the innovation has not been met. The plant of study has an obsolete infrastructure, centered on the efficiency on the treatment of sewage waters for the recovery of water of industrial use and on not developing technologies.