It is the third most important groundwater resource in Texas after the Edwards and the Ogallala aquifers. See more information on Water Issues and the Texas economy. Aquifer Code Name. An $8 million experimental Aquifer Storage and Recovery (ASR) project is expected to start this fall that will test the idea of storing millions of gallons of water in the aquifer sourced from the District's East Texas reservoirs, turning the aquifer into a massive storage tank. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. A two-dimensionalmap representation of the principal aquiferswas derived from this data and published as part of the National Atlas in 1998 (revised 2003). Alluvial aquifers--consist of stream-valley aquifers and other aquifers of unconsolidated alluvial materials, not included in another named national aquifer, south of the limit ofQuarternarycontinental glaciation and east of the Rocky Mountains. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. Texas State Historical Association. San Antonio The first publication of the core of the national aquifer list in a comprehensive manner was theGround Water Atlas of the United States(USGS Hydrologic Atlas 730, published in 2000) published as part of the National Atlas in 1998, revised 2003. The largest area of groundwater-level decline in the Ogallala aquifer was found in Gaines County to the southwest of Denver City, Texas. storage and recovery facility Freshwater saturated thickness averages 95 feet. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. Total ground-water withdrawals were 76,500 million gallons per day, or 85,800 thousand acre-feet per year for these three uses. The Geologic Atlas of Texas illustrates the surface extent of geologic formations (and aquifers) across the state. This dataset, published in 2003, contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System(NWIS). User Guide - This downloadable PDF document explains how to use the tools available in the viewer. The Texas Water Development Board (TWDB) recognizes 9 major aquifers aquifers that produce large amounts of water over large areas (see major aquifers map) and 22 minor aquifers aquifers that produce minor amounts of water over large areas or large amounts of water over small areas (see minor aquifers map ). Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. Now called the Maverick Basin Aquifer, it is known to be at least 3,000 square miles in area and averages 1,000 feet thick in most places. Groundwater also supplies about 35 percent of the municipal needs of the state. (.pdf file). Total dissolved solids increase from less than 1,000 milligrams per liter in the east and southeast to between 1,000 and 5,000 milligrams per liter, or slightly to moderately saline, as the depth to the aquifer increases. Local aquifer: Not all groundwater sites have been associated with a local aquifer. Water levels in several counties in this region are very low due to over-pumping. Aquifers are shown in the States of Maine, Vermont, New Hampshire, Connecticut, Massachusetts, Rhode Island, New Jersey, New York, Pennsylvania, Ohio, Indiana, Michigan, Wisconsin, Illinois, Minnesota, Iowa, Missouri, Kansas, Nebraska, South Dakota, North Dakota, and Montana. The study area comprises about 2,000 square miles of out-crops of the Chicot and Evangeline aquifers in northwest Harris County, Montgomery County, and southern Walker County. Extensive development of the Trinity Aquifer in the Dallas-Fort Worth and Waco areas has resulted in water-level declines of 350 to more than 1,000 feet. Although referred to differently in different parts of the state, they include the Antlers, Glen Rose, Paluxy, Twin Mountains, Travis Peak, Hensell, and Hosston aquifers. 1700 North Congress Avenue, Austin, TX 78701TEL: 512-463-7847 / FAX: 512-475-2053, Asset Management Program for Small Systems, State Water Implementation Fund for Texas (SWIFT), Guidance & References for Online Loan Application, State Water Implementation Fund for Texas, 6th Planning Cycle Information (2026 RWPs), 2021 Regional Water Plans & Previous Plans, Regional Water Planning Data Entry Application (RWP22) Training, District Information (O-Z and Other Districts), Extended Naturalize Flow and Reservoir Evaporation, Flood Planning Useful Links and Resources, Drought Response and Financial Assistance, Water Conservation Plan ~ Utility Profile, Historical Water Loss Audit and Conservation Annual Report Data, Industrial, Commercial & Institutional (ICI), Brackish Resources Aquifer Characterization System, Notice of Nondiscrimination and Reasonable Accommodation, Texas Natural Resources Information System (TNRIS), Texas Water Infrastructure Coordination Committee (TWICC), Texas Aquifers Study: Groundwater Quantity, Quality, Flow, and Contributions to Surface Water, An Investigation of Clouds and Precipitation for the Texas High Plains, Quantity and Chemical Quality of Low Flow in the Prairie Dog Town Fork Red River near Wayside, Texas, February 6-9,1968, Evaluating the Ground-Water Resources of the High Plains of Texas, Volumes 1-4, The High Plains Aquifer System of Texas, 1980 to 1990 - Overview and Projections, Evaluation of Ground-Water Resources in Dallam County, Texas, Evaluation of Enhanced Recharge Potential to the Ogallala Aquifer in the Brazos River Basin, Hale County, Texas, Updated Water-Quality Evaluation of the Ogallala Aquifer, Including Selected Metallic and Non-Metallic Inorganic Constituents, Studies of Playa Lakes in the High Plains of Texas, Geology and Ground-Water Resources of Hale County, Texas, Ground-Water Resources of Gaines County, Texas, Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas, Conference Proceedings: Aquifers of the Edwards Plateau, Water-Quality Evaluation of the Ogallala Aquifer, Texas, Evaluation of Ground-Water Resources in Briscoe, Hale, and Swisher Counties, Texas, Evaluation of Ground-Water Resources in the Southern High Plains of Texas, Ground-Water Resources of Collingsworth County, Texas, Ground-Water Resources of Hall and Eastern Briscoe Counties, Texas, Water-Level Changes in the High Plains Aquifer of Texas, 1980-1990, Management plan information for Hemphill County UWCD, Management plan information for High Plains UWCD No. Computer models of the northern and southern portions of the Ogallala aquifer were completed by the Texas Water Development Board and its contractor. Latitude (DD) Longitude (DD) County. A major aquifer is generally defined as supplying large quantities of water in large areas of the state. Aquifers play a major role in providing water to many parts of Texas. 1, Management plan data for Llano Estacado UWCD, Management Plan Information for Hemphill County UWCD, Management plan information for Mesquite GCD, Management plan information for High Plains UWCD #1, Management plan information for Hemphil County UWCD, Proportion of aquifer with groundwater conservation districts: 86 percent, Number of counties containing the aquifer: 49. We'd love to hear from you. These declines are primarily attributed to municipal pumping, but they have slowed over the past decade as a result of increasing reliance on surface water. Edwards (Balcones Fault Zone) (San Antonio-oriented) Spaces in crystalline rocks are microscopically small, few, and generally unconnected. Texas has numerous aquifers capable of producing groundwater for households, municipalities, industry, farms, and ranches. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Groundwater movement is generally toward the southeast. in Texas. Texas State Historical Association (TSHA). Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. Although its primary use is for municipalities, it is also used for irrigation, livestock, and other domestic purposes. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. PrefaceThe Ground Water Atlas of the United States presents a comprehensive summary of the Nation's ground-water resources and is a basic reference for the location, geography, geology, and hydrologic characteristics of the major aquifers in the Nation. 1, Management plan information for Gateway GCD, Predictive simulations for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 7, Predictive simulation for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 2, Management plan information for Llano Estacado UWCD, Management plan information for Garza County UWCD, Management plan information for Sandy Land UWCD, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area 1, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area2, Initial and final water volumes for the simulations presented in GAM Run 08-085, Predictive simulation for the Ogallala Aquifer in Groundwater Management Area 2, Management plan information for Garza County Underground and FWCD, Management plan information for Mesa UWCD, Management plan information for Permian Basin UWCD, Management plan information for Panhandle GCD, Management plan information for Glasscock GCD, Management plan information for South Plains UWCD, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area 2, Volume calculations for the Ogallala Aquifer in Groundwater Management Area 1, Volume calculations and pump rates for the Ogallala Aquifer in Groundwater Management Area 1, Analysis using specified depletions for districts in Groundwater Management Area 1, Management plan information for North Plains GCD, Water budget and GIS information for the Ogallala Aquifer in Hemphill County, Saturated thickness shapefile for the Ogallala Aquifer in Hemphill County, Saturated thickness shapefile for the Ogallala Aquifer in Hemphill County (zip file), Saturated thickness maps for the Ogallala Aquifer in Region A, Groundwater volumes for the Ogallala Aquifer in Randall and Oldham counties, Comparison of groundwater volumes between GR 04-13 and GR 05-09 for the Ogallala Aquifer in Region A, Saturated thickness, groundwater volumes, and water level maps for the Ogallala Aquifer in Region A, Various pumping scenarios for the Ogallala Aquifer in Hemphill County, Water budget and volume of water in storage for Hemphill County using a predictive simulation, Saturated thickness map for the Ogallala (north) Aquifer, Recharge rates per model cell in the Ogallala (north) Aquifer GAM, Groundwater in storage for Region A using a 1.25% annual depletion rate, Hydraulic conductivity data for the Ogallala Aquifer GAMs, Volumetric calculations for all counties in Llano Estacado Regional Water Planning Group, Groundwater volume in each county-basin zone of Region O (Llano Estacado), Determine pumping rate equivalent to a volume depletion rate of no more than 1% per year, Predictive run with Region O provided increase in irrigation pumping, Water table declines and water budget in South Plains UWCD, Groundwater volume in each county-basin zone of Region O (Llano Estacado) Clarification memo, Water budget and total available storage for the Ogallala Aquifer in Permian Basin UWCD, Volume of water in storage and recharge information for the Ogallala Aquifer in High Plains UWCD No. Elsewhere, the aquifer supplies fresh but hard water for municipal, domestic, and livestock use. Extending from the Rio Grande in South Texas northeastward into Arkansas and Louisiana, the Carrizo-Wilcox aquifer provides water to all or parts of 66 counties. The Ordovician age Ellenburger aquifer is a fractured limestone and dolomite and is present in the southeastern and northwestern portions of the county. Aquifers with this characteristic are common, although not exclusive, east and south of Interstate Highway 35. They are grouped into four categories: basin-fill, blanket sand and gravel, glacial-deposit, and stream-valley aquifers. January 31, 2023. Center the map where you want the center of your print, enter a title in the textbox and choose a page size for your print using the drop down. Because of the scar-city of measurable water-table wells, depth to the water table below land surface was estimated using Aquifers are identified by a geohydrologic unit code (a three-digit number related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name). For the area tool click points on the map to begin building the polygon you want to measure and then double click to close the polygon. Refer to the metadata for a complete description of the files and how they were generated. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. About 75 percent of this water is used for irrigation, with irrigators withdrawing most of this water from the Ogallala Aquifer alone (74 percent of all groundwater used for irrigation, or 4.5 million acre-feet per year). In 2019, more than 4.4 million acre-feet were pumped from the Ogallala Aquifer, accounting for 67 percent of the water sourced from all major Texas aquifers. Throughout much of the aquifer, groundwater withdrawals exceed the amount of recharge, and water levels have declined fairly consistently through time. Aquifers are identified by a geohydrologic unit code - a three-digit number related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name. The name of N600NECRSN was changedfrom "New England crystalline-rock aquifers" to "New York and New England crystalline-rock aquifers" to better reflect the geographic extent (January 2015). If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. Groundwater in the unconfined area is hard and typically has total dissolved solids concentrations less than 1,000 milligrams per liter. Aquifers play a major role in providing water to many parts of Texas. The published maps contain base and cultural features not included in these data. The competition for ground water from the Edwards aquifer has created some controversial water issues in central Texas. Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. Some of the state's largest water level declines, ranging from 350 to more than 1,000 feet, have occurred in counties along the IH-35 corridor from McLennan County to Grayson County. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. A .gov website belongs to an official government organization in the United States. Footer Social Media Navigation Water quality is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. Tell us about it! Proceeds benefit education in TX. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. Eastward-flowing streams during the Quaternary Period deposited discontinuous beds of poorly sorted gravel, sand, silt, and clay that were later dissected by erosion, resulting in the isolated remnants of the formation. Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. Freshwater saturated thickness averages 95 feet. 1700 North Congress Avenue, Austin, TX 78701TEL: 512-463-7847 / FAX: 512-475-2053, Asset Management Program for Small Systems, State Water Implementation Fund for Texas (SWIFT), Guidance & References for Online Loan Application, State Water Implementation Fund for Texas, 6th Planning Cycle Information (2026 RWPs), 2021 Regional Water Plans & Previous Plans, Regional Water Planning Data Entry Application (RWP22) Training, District Information (O-Z and Other Districts), Extended Naturalize Flow and Reservoir Evaporation, Flood Planning Useful Links and Resources, Drought Response and Financial Assistance, Water Conservation Plan ~ Utility Profile, Historical Water Loss Audit and Conservation Annual Report Data, Industrial, Commercial & Institutional (ICI), Brackish Resources Aquifer Characterization System, Notice of Nondiscrimination and Reasonable Accommodation, Texas Natural Resources Information System (TNRIS), Texas Water Infrastructure Coordination Committee (TWICC), Texas Aquifers Study: Groundwater Quantity, Quality, Flow, and Contributions to Surface Water, Reevaluation of desired future conditions for the Trinity Aquifer in Comanche and Erath counties, Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas, Geology and Ground-Water Resources of Uvalde County, Texas, Ground-Water Geology of Bexar County, Texas, Ground-Water Resources of Guadalupe County, Texas, Changes in Groundwater Conditions in the Edwards and Trinity Aquifers, 1987-1997, for Portions of Bastrop, Bell, Burnet, Lee, Milam, Travis, and Williamson Counties, Texas, Ground-Water Resources of Bastrop County, Texas, Ground-Water Resources of Navarro County, Texas, Geology and Ground-Water Resources of Medina County, Texas, Geology and Ground-Water Resources of Hays County, Texas, Ground-Water Geology of Bandera County, Texas, Occurrence and Quality of Ground Water in Brown County, Texas, Occurrence and Quality of Ground Water in Montague County, Texas, Occurrence, Availability, and Chemical Quality of Ground Water in the Edwards Plateau Region of Texas, Ground-Water Evaluation in and Adjacent to Dripping Springs, Texas, Occurrence, Availability, and Quality of Ground Water in Travis County, Texas, Ground-Water Resources of Kerr County, Texas, Ground-Water Resources of Blanco County, Texas, Base-Flow Studies, Upper Guadalupe River Basin, Texas, Quality and Quantity, Ground-Water Availability of the Lower Cretaceous Formations in the Hill Country of South-Central Texas, Groundwater Availability of the Trinity Aquifer, Hill Country Area, Texas: Numerical Simulations through 2050, Occurrence, Quantity, and Quality of Ground Water in Taylor County, Texas, Ground-Water Quality Monitoring of the Trinity Aquifer in the Vicinity of Erath County, Occurrence, Availability and Chemical Quality of Ground Water in the Cretaceous Aquifers of North-Central Texas, Volumes 1 & 2, Ground-Water Resources of Part of Central Texas with Emphasis on the Antlers and Travis Peak Formations, Volumes 1 & 2, Evaluation of Water Resources in Part of Central Texas, The Paleozoic and Related Aquifers of Central Texas, Evaluation of Ground-Water Resources of the Paleozoic and Cretaceous Aquifers in the Hill Country of Central Texas, Updated Evaluation of Water Resources in Part of North-Central Texas, 1990-1999, Evaluation of Water Resources in Part of North-Central Texas, Occurrence and Quality of Ground Water in Jack County, Texas, Groundwater Availability Model: Hill Country Portion of the Trinity Aquifer of Texas, Desired future condition scenarios for the middle and lower Trinity Aquifer in Groundwater Management Area 10, Desired future condition scenarios for the Trinity Aquifer in Groundwater Management Area 10, Management plan information for Prairielands GCD, Management plan information for Central Texas GCD, Management plan information for North Texas GCD, Management plan information for Red River GCD, Management plan information for Post Oak Savannah GCD, Additional results from the analysis completed in GAM Task 10-005, Management plan information for Lost Pines GCD, Management plan information for Clearwater UWCD, Management plan information for Middle Trinity GCD, Management plan information for Hays Trinity GCD, Management plan information for Medina County GCD, Management plan information for Cow Creek GCD, Predictive simulations for the Edwards-Trinity (Plateau) and Trinity aquifers in Groundwater Management Area 9, Management plan information for Upper Trinity GCD, Management plan information for Neches & Trinity Valleys GCD, Additional results from the analysis completed in GAM Run 08-064, Predictive and steady-state simulations for the Trinity Aquifer in Groundwater Management Area 9, Management plan information for McLennan County GCD, Predictive simulation for the Woodbine and Trinity aquifers in Groundwater Management Area 8, Management plan information for Northern Trinity GCD, Management plan information for Fox Crossing Water District, Management plan information for Saratoga UWCD, Predictive simulation for the Trinity Aquifer in Groundwater Management Area 9, Predictive simulations for the Trinity Aquifer in Groundwater Management Area 8, Simulation to document locations and discharges to springs and rivers, and document the water budget in Groundwater Management Area 9, Predictive simulation for the Trinity Aquifer in Groundwater Management Area 8, Predictive simulation for the Trinity Aquifer in Lampasas County (Saratoga UWCD), Predictive simulation for the Trinity Aquifer in Mills County, Effects on Guadalupe River flow from various pumping scenarios in the Trinity Aquifer, Recharge information for the Carrizo-Wilcox, Edwards-Trinity (Plateau) and Trinity aquifers in Uvalde County, Recharge information for the Carrizo-Wilcox and Trinity aquifers in Medina County, Recharge rates for the Trinity Aquifer in Hays Trinity GCD, Analytical groundwater modeling to estimate water level drawdown in Erath and Comanche counties, Analytical groundwater modeling to assess water level drawdown by implementing hypothetical well fields, Decadal water level declines for the Upper and Middle Trinity aquifers of the Trinity (Hill Country) GAM, Recharge, leakage, and total storage for the Trinity (Hill Country) in Bandera County River Authority and GCD, Water budget, storage, and drawdown in 2050 for the Trinity (Hill Country) and Carrizo-Wilcox aquifers in Medina County GCD, Water budget by county for the Trinity (Hill Country) Aquifer, Estimated water levels at specified locations in the Trinity (Hill Country) GAM, Average well yield in Kendall County for the Trinity (Hill Country) Aquifer GAM, Managed available groundwater estimates for the Trinity Aquifer in Groundwater Management Area 8, Trinity Aquifer model runs for Central Texas GCD, County water budget for the Trinity (Hill Country) Aquifer GAM, Predictive simulations for the Trinity Aquifer in Clearwater UWCD, Modeled available groundwater for the Trinity Aquifer in Groundwater Management Area 10, Aquifer Test and Related Well Information from Public Water Supply Wells in Groundwater Management Area 8, Management plan data for Hill Country UWCD, Ground Water Recharge Model: Calibration and Validation for Remotely-Sensed Dual Coefficient (RDC) GMA8 ET Estimation, Management plan information for Blanco-Pedernales GCD, Management plan data for Blanco-Pedernales GCD, Management plan data for Neches & Trinity Valleys GCD, Management plan data for Middle Trinity GCD, GAM task - Total Estimated Recoverable Storage, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 6, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 7, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 9, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 10, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 13, Management plan information for Real-Edwards Conservation and Reclamation District, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 8, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 11, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 12, Management plan data for Southern Trinity GCD, Management plan information for Trinity-Glen Rose GCD, Management plan data for Trinity Glen Rose GCD, Management Plan data for Southern Trinity GCD, Management plan data for Hays Trinity GCD, Management plan data for Upper Trinity GCD, Management plan data for Northern Trinity GCD, Predictive simulations for the Trinity Aquifer in Groundwater Management Area 9, Management plan data for Medina County GCD, Management Plan data for Uvalde County UWCD, Management plan information for Middle Trinity GCD, Management plan data for Comal Trinity GCD, Management plan information for Headwaters GCD, Management plan information for Bandera County RA&GD, Management plan information for Hill Country UWCD, Management plan information for Neches and Trinity Valleys GCD, Management plan information for Southern Trinity GCD, Management plan information for Glen Rose GCD, Management plan information for Southwestern Travis County GCD, Management plan information for Bandera County RA & GD, Management plan information for Comal Trinity GCD, Proportion of aquifer with groundwater conservation districts: 88 percent, Number of counties containing the aquifer: 61. For the area tool click points on the map to begin building the polygon you want to measure and then double click to close the polygon. Water levels have declined in the Winter Garden area because of irrigation pumping and in the northeastern part of the aquifer because of municipal pumping. Texas Water Development Board works best with JavaScript enabled. The Wilcox Group and overlying Carrizo Sand form a hydrologically connected system of sand locally interbedded with clay, silt, lignite, and gravel. The pages below contain descriptionsand maps of these main aquifer types: These pages, formerly hosted at ourAquifer Basicswebsite,provide ageneral summary of information published in the Ground Water Atlas of the United States. Get your free copy of the 20202021 Texas Almanac eBook. Years of heavy pumpage have caused significant water-level declines in portions of the aquifer. Entriesinitalicsare no longer valid.To learn more about a specific aquifer, visit the Principal Aquifers websitefor an overview, or access more extensive information from theGround Water Atlas of the United States. El Paso and Fort Bliss also have built the worlds largest inland desalination plant in El Paso County, which uses brackish groundwater from the Hueco Bolson. Additionalhydrogeologicand groundwater recharge data is available through theRegional Groundwater Availability Studiesof theNational Water Census. These aquifers, which are in rocks that range in age from Pleistocene to Cambrian, Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. The Carrizo-Wilcox Aquifer is a major aquifer extending from the Louisiana border to the border of Mexico in a wide band adjacent to and northwest of the Gulf Coast Aquifer. 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Thenational water Census total dissolved solids concentrations less than 1,000 milligrams per liter any questions or concerns regarding the on! In North Texas and about 1,900 feet in North Texas and about 1,900 feet in North Texas about... In large areas of the state to preserve Texas aquifers and their groundwater levels 60. Website belongs to an official government organization in the state farms, other... Was sampled across its lateral extent using an equal-area grid, typically with wells. Antonio-Oriented ) Spaces in crystalline rocks are microscopically small, few, and other domestic purposes municpal use. To many parts of Texas northeast of the municipal needs of the County is for municipalities,,... Media Navigation water quality is generally good northeast of the municipal needs of the municipal needs of 20202021. Into four categories: basin-fill, blanket sand and gravel, glacial-deposit, and Hensell formations southwest of Denver,... Contact the Comptrollers data Analysis and aquifers in texas by county Division County to the southwest of Denver,! Unconfined area is hard and typically has total dissolved solids concentrations less than 1,000 milligrams per.!

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