The pressures on the water system are such that the city's burgeoning population now extracts water from its aquifers more than twice as fast as they are replenished. As a result, the city is sinking on top of the aquifer that supplies it. It has fallen nearly 30 feet in the last century and drops as much as 15 inches a year in some areas.
Delgado Peralta noted that one of the keys to ensuring the viability of local water sources was to broaden reforestation programs and conserve forests, which she called "natural water factories."
Currently, nearly 11 cubic meters of water are lost per second in Mexico City due to leaky pipes. A plan to eliminate the leaks in part by replacing old pipes has been moving slowly. The city also plans to increase wastewater treatment, restore reservoirs within the city limits, and the construct wells to capture more rainwater. The Valley of Mexico treats less than 10 percent of its wastewater at present. She added that the city may have to hike rates in order to pay for the new initiatives. :: Via El Universal (Spanish link)