 It spreads over a surface of 4,250 km2 and has a metropolitan population of approximately 21.2 million, concentrating 18% of the country's population.It covers over 16 boroughs of Mexico City and 34 municipalities of State of Mexico.Additionally, the growth of the city has created a very large and complex hydraulic system fed from 3 different water bodies (the aquifer of Mexico Valley (70%), Lerma-Balsas river basin (9%) and Cutzemala river basin (21%)), where 40% of the water in the network is lost due leakages and illegal connections.