therefore the ten most important cities of the region which concentrate of the total population mainly rely on the overexploited aquifers to extract water resources rather superficial waters on average of total water consumption and more than of groundwater is devoted to agriculture creating related significant challenges for the sustainability of the agrifood industry water scarcity is even more exacerbated by the bilateral water transboundary agreement signed between mexico and the united states the state of chihuahua has been the main net contributor providing million m to the us without benefitting from the million m given by the us to other mexican states