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Transboundary Aquifers along the United States and Mexico Border

The International Boundary and Water Commission (IBWC) has been involved in the study of transboundary aquifers since the approval of Minute No. 242 signed on August 30, 1973. Scientists from both countries representing universities, federal, and state agencies have been brought together to evaluate hydrologic and other pertinent data for the shared transboundary aquifers along the United States and Mexico border.



On December 2, 1997, the IBWC issued the “Joint Report of Principal Engineers Regarding Information Exchange and Mathematical Modeling in the El Paso, Texas and Ciudad Juarez, Chihuahua Area Aquifer”.

On December 22, 2006, the “United States- Mexico Transboundary Aquifer Assessment Act” was passed, establishing a program to evaluate aquifers between the United States and Mexico.

On August 19, 2009, the Principal Engineers of the IBWC signed the “Joint Report of the Principal Engineers Regarding the Joint Cooperative Process United States-Mexico for the Transboundary Aquifer Assessment Program”.

The objective of the joint cooperative process is to facilitate the exchange of data and assure the concurrence of the United States and Mexico for binational aquifer assessment activities, facilitate the evaluation of aquifers, establish and coordinate binational technical advisory committees for each aquifer, and establish an official repository for binational project reports and data developed under the program.

The following links provided will direct readers to information for each aquifer that is currently being studied under the program.

Projects by Aquifer:
Hueco Bolson
Mesilla Basin – Conejos Medanos binational work group
San Pedro River Aquifer work group