This report is a primer on U.S. and Mexican water-sharing topics. It focuses on surface water quantity sharing and recent developments, including drought conditions. Due to Mexico's recent below-target deliveries of Rio Grande water to the United States, particular attention is given to the status, underlying causes, and responses to the Rio Grande water debt. This report describes: legal obligations and processes under the 1944 Water Treaty; drought conditions from 2010 to 2013; water sharing and developments in the Colorado River Basin; water sharing in the Rio Grande Basin and Mexico's water debt; and stakeholder, diplomatic, and legislative responses to Mexico's Rio Grande water debt.

This report provides an overview of U.S.-Mexico economic relations, trade trends, the Mexican economy, NAFTA, and trade issues between the United States and Mexico.