Piura is the second department of Peru which has the biggest number of population. According to National Institute of Statistics and Informatics, this department has 1 676 315 persons, Census 2007. The area of analysis is Piura and Castilla Districts which make up the City of Piura. Across the years, the population of Piura has been using groundwater to satisfy their needs without knowledge of the aquifer and how they are relate to the urban area.This report show, such as using Geographic Information Systems (GIS) has been linked surface lithology of the study area with groundwater information. In order to raise the first foundations for future development of Water Management Plan for the city of Piura.