96% of the water pumped out every year is used for irrigation in the Texas Panhandle
Gulf Coast
62% of annual pumping supplies water for Texas towns and cities, with 25% going toward agriculture; reserves are straining as Texas populations increase
Edwards
72% of annual pumping supplies drinking water for Texas cities but especially San Antonio and Austin; water runs in limestone fractures and subterranean “honeycomb” zones.
Carrizo
Sand and clay carry fresh and slightly brackish water; 43% of annual pumping supplies agriculture, 47% is used by Texas towns and cities
Trinity
Dallas, Fort Worth, and Waco drink this water which has led to declines in water depth in some places of between 300 and 1,000 feet
Edwards -- Trinity Plateau
Of groundwater pumped from this aquifer, more than two-thirds is used for irrigation, with the remainder used for municipal and livestock supplies. Water levels have remained relatively stable because recharge has generally kept pace with the relatively low amounts of pumping over the extent of the aquifer.
Seymour
A thin layer of water-bearing gravel, typically less than 100 feet think
Hueco -- Mesilla Bolson
This layer of water-bearing clay, silt, sand, and gravel in some 2,000 feet thick in places and provides most of the water supply for El Paso, Texas, and Ciudad Juarez, Chihuahua.
Pecos
Nearly 1,500 feet thick, the water that comes from this zone tends to be brackish, hard, and full of dissolved minerals
