Among the characteristics of the hydrographic network associated with the city of Caracas is the high degree of contamination that the entire network presents in its lower part due to the fact that the courses of rivers and tributaries of the Guaire River have been used as collectors of the water system. sewers and sewers since its creation in 1874 during the government of Antonio Guzmán Blanco until today. The level of contamination is such that it does not allow the maintenance of the life of the species that once populated the basin, and it has become extinct or has been restricted to the highest areas of the basin, mainly within the boundaries of the national park. Avila. Awareness for the recovery of the basin has recently begun, however, much remains to be done before results can be observed.