TAAP-Transboundary Aquifer Assessment Program

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Collaboration in Binational Research and Engagement on Shared Aquifers

Photo: Quitobaquito Springs, Arizona


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Border Map

TAAP-A/S (Transboundary Aquifer Assessment Program-Arizona/Sonora) is a federally funded program co-hosted by the USGS Arizona Water Science Center in Tucson, Arizona, and the Water Resources Research Center (WRRC) at the University of Arizona. The program originates from U.S. Public Law 109-448, signed by the President on December 22, 2006 as the Transboundary Aquifer Assessment Act. The Act applies to the states of Texas, New Mexico, and Arizona, where four transboundary aquifers have been designated for priority assessment; those being the Hueco Bolson and Mesilla Basin aquifers in the greater El Paso / Ciudad Juárez region, and the Santa Cruz and San Pedro aquifers across the Arizona – Sonora border (see map). TAAP-A/S is designated to operate for 10 years, with $50 million authorized for appropriation over that time period.


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