The Hueco-Tularosa Basin is located in south-central New Mexico, western Texas, and north-western Chihuahua, Mexico. It is a large alluvial basin comprised of the Hueco-Tularosa and Southeastern Hueco aquifers, both of which are important groundwater supplies in the region. The aquifer is comprised of Tertiary and Quaternary basin-fill (bolson) deposits. The Hueco Bolson is made up of silt, sand and gravel in its upper layer, while clay and silt make up the lower section; together these layers are some 9,000 feet thick. Depending on the location, water quality varies in the Hueco Basin. Most of the supply is saline; however, fresh water is found in the upper several hundred feet of the basin. The Hueco Bolson is the main water source in the El Paso - Ciudad Juarez region. Excessive ground water withdrawals have resulted in significant declines in water-level.

The menu bar to the left provides quick access to other areas of this website. The Home link will always return you to this page. To access the data site, use the Data Viewer link. Metadata for the data accessed here is located at the Metadata link. The Help link will transfer you to a page describing the tools available in the Data Viewer application and an example of how to use the site. Finally, you can access a page of related websites by clicking on Links.