Aquifer Insights
Unlock the Potential of Texas Groundwater Data
In a state where water is the most precious commodity, information is power. 9 Major delivers high-resolution analytics for Texas’s 31 diverse aquifers, providing a vital resource for both the public and private sectors.
We move beyond the spreadsheet, offering:
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Bi-Weekly Updates: Real-time awareness of Texas water conditions.
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Comprehensive Visuals: Deep dives into water quality, well construction, and historical trends.
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Strategic Context: Expert-level interpretation for 9 major aquifers.
Whether you require high-level regional monitoring or custom GIS-driven insights, our team provides the clarity needed for sustainable water management.
Request a custom analysis:
Carrizo-Wilcox Aquifer
Major Cities: Tyler, Bryan-College Station, San Antonio, Crystal City
Composition: Primarily made of sand locally interbedded with gravel, silt, clay, and lignite (coal).
Number of Monitored Wells: 7070
Deepest Well: 6,280 ft
Shallowest Well: 21 ft
Average Well Depth: 602.22 ft
Average Water Level Below Surface: 119 ft
Edwards Aquifer
Major Cities: San Antonio, South Austin, Georgetown
Composition: Primarily made of Early Cretaceous-aged limestones (roughly 100 million years old) that are 300 to 700 feet thick.
Number of Monitored Wells: 2648
Deepest Well: 3,488 ft
Shallowest Well: 23 ft
Average Well Depth: 592.74 ft
Average Water Level Below Surface: 141.79 ft
Edwards - Trinity Aquifer
Major Cities: Dell Rio, Fort Stockton, Midland & Odessa, San Angelo
Composition: The Edwards-Trinity (Plateau) Aquifer is a “geologic sandwich” consisting of a top layer of fractured limestone and a bottom layer of porous sandstone. This combination allows the system to quickly capture rainfall through the limestone’s cracks while storing vast amounts of water within the underlying sand grains.
Number of Monitored Wells: 2648
Deepest Well: 3,488 ft
Shallowest Well: 23 ft
Average Well Depth: 592.74 ft
Average Water Level Below Surface: 141.79 ft
Gulf Coast Aquifer
Major Cities: Houston, Galveston, Beaumont, Port Arthur, Corpus Christi, Victoria, McAllen
Composition: The Gulf Coast Aquifer is composed of thousands of feet of interbedded sand, silt, clay, and gravel. It is essentially the result of ancient rivers dumping sediment into the Gulf over millions of years.
Number of Monitored Wells: 17,450
Deepest Well: 10,500 ft
Shallowest Well: 21 ft
Average Well Depth: 410.33 ft
Average Water Level Below Surface: 79.31 ft
Hueco-Mesilla Aquifer
Major Cities: El Paso, Fort Bliss, Ciudad Juarez (Mexico)
Composition: Deep, sediment-filled trough (a “bolson”) located in the extreme western tip of Texas. It is part of the larger Hueco-Mesilla Bolson aquifer system, which is a critical transboundary resource shared by two states and two countries.
Number of Monitored Wells: 802
Deepest Well: 1,705 ft
Shallowest Well: 49 ft
Average Well Depth: 615.02 ft
Average Water Level Below Surface: 232.47 ft
Pecos Aquifer
Major Cities: Pecos, Monahans, Fort Stockton
Composition: Composed of Tertiary and Quaternary-age alluvium (sediment deposited by water) and eolian (windblown) deposits.
Number of Monitored Wells: 1261
Deepest Well: 995 ft
Shallowest Well: 20 ft
Average Well Depth: 291.22 ft
Average Water Level Below Surface: 104.77 ft
Seymour Aquifer
Major Cities: Burkburnett, Electra, Seymour
Composition: Consists of poorly sorted beds of gravel, sand, silt, and clay.
Number of Monitored Wells: 3370
Deepest Well: 217 ft
Shallowest Well: 21 ft
Average Well Depth: 50.36 ft
Average Water Level Below Surface: 26.61 ft
Ogallala Aquifer
Major Cities: Lubbock, Amarillo, Plainview, Midland
Composition: Consists of poorly sorted beds of gravel, sand, silt, and clay.
Number of Monitored Wells: 9,780
Deepest Well: 1499 ft
Shallowest Well: 21 ft
Average Well Depth: 212.53 ft
Average Water Level Below Surface: 128.27 ft
Trinity Aquifer
Major Cities: Dallas-Fort Worth, Arlington, Plano, Denton, Waco, Temple, Killeen, Stephenville, Boerne, Wimberley, Dripping Springs
Composition: Consists of several stacked layers of volcanic ash, sands, and limestones that stretch from the Red River at the Oklahoma border down into Central Texas.
Number of Monitored Wells: 9,780
Deepest Well: 999 ft
Shallowest Well: 20 ft
Average Well Depth: 477.28 ft
Average Water Level Below Surface: 199.99 ft
