This article contains an analysis of the current situation in Spain with respect to the reuse of treated effluent, outlining the different experiences obtained together with the future prospects. In matters concerning reuse, Spanish Law places particular emphasis on the planning of basic State regulations that are now being drawn up by the Ministry of Environment, as well as developing other supplementary tools for hazard control and the breakthroughs that are in the process of being made in the planning area. Finally, an account is given of a series of observations that the authors believe to be relevant with respect to achieving sustainable progress for reuse in Spain.