The purpose of the present study is 6 hydrological basins that are part of the Coatzacoalcos River Hydrological Subregion Number 29 Coatzacoalcos Hydrographic Region, which are located within the states of Veracruz and Oaxaca, comprising 3005 municipalities. The population in 2010 of these municipalities was 1,108,687 inhabitants and is expected by the year 2070 to reach 1,654,098 inhabitants, which requires an additional volume to that currently supplied to the urban and rural localities of these municipalities. The study concludes by recommending the establishment of surface national water reserves to be used for the urban and domestic public uses of the population, which is forecast to be 2070 for a total volume of 37.987 million cubic meters, distributed in the 6 hydrological basins studied, as well as to reserve 16,290 Million cubic meters for environmental use or for ecological conservation in the plains basin of Llanuras of Coatzacoalcos.