According to estimates of IDEAM 1 , Colombia has 742,705 drainage basin units, indicating the total water supply will surpass 2,000 km3/year, which corresponds to 57,000 m3/year*Hab. Despite this abundant water supply, in this country, a considerable amount of the population has no access to drinking water because of problems associated with availability (quantity, quality or accessibility), the rural population being the most affected. Currently in the country, 13.6 million people live in rural areas, of which 39.7% have no water supply system, 60% have no sanitary or sewer units and only 11% have access to treated water. The situation in 2009 was reflected by the 189,480 cases of disease and 7,900 people who died because of perinatal mortality, acute diarrheal disease, malaria, dengue, and cholera, all of which are diseases associated with water quality.Problems with the availability of water resources are associated with causes such as population growth, spatial distribution, pollution, and mismanagement of the resource associated with poor governing and implementation of policies.