Water management in Greater Mexico City
Greater Mexico City (Zona Metropolitana del Valle de México), a metropolitan area with more than 19 million inhabitants including Mexico's capital (Ciudad de México, or CDMX) with about 9 million inhabitants, faces tremendous water challenges. These include groundwater overexploitation, land subsidence, the risk of major flooding, the impacts of increasing urbanization, poor water quality, inefficient water use, a low share of wastewater treatment, health concerns about the reuse of wastewater in agriculture, and limited cost recovery.
Source: Wikipedia — Water management in Greater Mexico City (CC BY-SA 4.0)