Among the main rivers and streams that make up the basin are in its northern slope: San Pedro River, Macarao River, Quebrada Caroata, Catuche River, Anauco River, Chacaito River, Tocome River, Caurimare River; on its southern slope we find that among the main tributaries are: El Valle river, Quebrada Baruta and Quebrada La Guairita. In the upper part of the basin there are two reservoirs with the purpose of supplying water to the western part of the city; These are the Macarao Dam and the La Mariposa Reservoir.