The Mesilla basin aquifer system is an extensive intermontane aquifer system which extends from southern New Mexico to Northern Mexico. The aquifer's boundaries are comprised of the Organ, San Augustine, Franklin, Portillo, Robledo, Dona Ana, and Sierra de Cristo Mountains. The Rio Grande traverses the Mesilla basin for 60 miles and exits into the Hueco Bolson. The two main methods for the aquifer to be recharged are seepage from the Rio Grande and deep percolation of applied irrigation water.
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