Urban hydrographic basins are susceptible to the intensive anthropic action of the surroundings, which insufficiently ordered spatial occupation results in losses for both the population and the environment. In this regard, knowing the morphological characteristics of hydrographic basins is a fundamental step in the construction of public policies for the sustainable management of urban waters. With this in mind, this study aimed to carry out the morphometric characterization of the hydrographic basin of the Igarapé Quarenta Horas, located in the municipality of Ananindeua-PA, Northern Brazil. The methods involved GIS tools and the application of Digital Elevation Models, which allowed quantifying geometric, drainage, and relief network characteristics, resulting in 33 identified variables. Results indicated the basin has satisfactory drainage conditions with no tendency to flood. However, this municipality has the lowest level of basic sanitation in Brazil, which justifies the occurrence of constant flooding even with the natural morphometric facility of that area.