Researchers have identified a previously undiscovered aquifer in southwest Texas. In the south, the Trinity includes the Glen Rose and underlying Travis Peak formations. 6 character identifier derived from the aquifer name using the code derivation procedure also used for GWSI geohydrologic unit names. The Ogallala Aquifer is the largest aquifer in the United States and is a major aquifer of Texas underlying much of the High Plains region. It is composed of several smaller aquifers contained within the Trinity Group. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. 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. General Information Letters and Private Letter Rulings, State Tax Automated Research (STAR) System, Historically Underutilized Business (HUB), Vendor Performance Tracking System (VPTS), Texas Procurement and Contract Management Guide, Minnie Stevens Piper Foundation College Compendium. A .gov website belongs to an official government organization in the United States. Would you like to submit an article, provide feedback, or just get in touch? Water Quality Available. About 60 percent of the approximately 16 million acre-feet of water used yearly in Texas is derived from underground formations that make up 9 major and 22 minor aquifers. Increased salinity may be associated with evaporative concentration of groundwater in saline playa lakes in the southern portion of the aquifer, up flow of more saline groundwater from the underlying Dockum Aquifer and other sources./p>. National Geographic Information Systems (GIS) layer of SSAs Information on sole source aquifers (SSAs) is widely used in assessments under the National Environmental Policy Act and at the state and local level. Water Tour | Aquifers Overview | Print Snapshot (PDF). The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. Find out the correct way to pronounce Mexiaalong with hundreds of other places all across Texasby downloading our helpful Pronunciation Guide storage and recovery facility Edwards (Balcones Fault Zone) (San Antonio-oriented) 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. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Additional aquifer data through the USGS web app The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. N or S, where N = aquifer, S = aquifer system, 3 digit number = rock type (4 digits used for "Other" to fill out the code), 100-- Sand and gravel aquifers200--Semiconsolidatedsand aquifers (not used)300--Sandstone aquifers400--Carbonate-rock aquifers500--Sandstone and carbonate-rock aquifers600--Igneous and metamorphic-rock aquifers9999--Areas that are not a national aquifer, 6 character identifier derived from the aquifer name using thecode derivation procedure also used for GWSI geohydrologic unit names. A lock () or https:// means youve safely connected to the .gov website. Please note that the maps do not show the entire extent of an aquifer, only itssubcropor outcrop area. New and Environmentally Improved. Water levels in the Trinity Aquifer, the county's main source of groundwater, plunged. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . Some water-bearing formations dip below the surface and are covered by other formations. In 2008, about 72 percent of pumpage from the aquifer was for municipal use. Texas Water Development Board works best with JavaScript enabled. Irrigation used the largest amount of ground water, 56,900 million gallons per day, foll, 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. For the location tool click on the map to get coordinates for a particular location. 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). Geology, Major and Minor Aquifers, BRACS Study Areas, Regional Water Planning Areas, Groundwater Management Areas, Groundwater Conservation Districts, River Basins, Counties, 7.5' United State Geological Survey Grid, 2.5' State Grid, Latitude, Longitude, and Land Elevation. 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. Aquifer Code Name. We'd love to hear from you. Secure .gov websites use HTTPS Elsewhere, water from the Trinity Aquifer is used primarily for municipal and domestic supply. Share sensitive information only on official, secure websites. Select the area, distance or location tool below. Texas Water Development Board works best with JavaScript enabled. The Texas Water Development Board recognizes and names 15 such aquifers. The characterization of the state's groundwater resources and the development of the maps depicting these aquifers have been accomplished by many staff members of the TWDB over many years. Such sites will not be retrieved using this search criteria. 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. 1, Water table decline maps for the Ogallala Aquifer in South Plains UWCD, Water budget and total available storage for the Ogallala Aquifer in Garza County UFWCD, Water budget and total available storage for the Ogallala Aquifer in Mesa UWCD, Terry county water budget for the Ogallala Aquifer, Predictive simulations for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 2, Management plan data for North Plains GCD, Groundwater Recharge in the Central High Plains of Texas: Roberts and Hemphill Counties, Revised management plan data for North Plains GCD, Management plan data for Garza County UWCD, GAM task - Total Estimated Recoverable Storage, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 1, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 2, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 3, 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 by county for aquifers in High Plains UWCD No. Parts of the aquifer in the Winter Garden area and portions of Brazos County are slightly to moderately saline, with total dissolved solids ranging from 1,000 to 7,000 milligrams per liter. 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. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. Water level increases were found in the northern portion of the study area, near the Yoakum and Terry County boundary and in northeastern Gaines County. Texas State Historical Association. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. The Edwards aquifer in the Balcones fault zone of southcentral Texas is one of the most permeable and most productive aquifers in the world. January 31, 2023. Barton SpringsEdwards Aquifer Conservation District provides aquifer management for the rest of Hays and southern Travis counties, and the Kinney County Groundwater Conservation District manages the aquifer segment within Kinney County. The Ogallala aquifer extends through 48 counties of the Texas Panhandle and is the southernmost extension of the largest aquifer (High Plains aquifer) in North America. The appropriate component aquifer should be used instead of Northern Great Plains. The Ordovician age Ellenburger aquifer is a fractured limestone and dolomite and is present in the southeastern and northwestern portions of the county. Groundwater in the unconfined area is hard and typically has total dissolved solids concentrations less than 1,000 milligrams per liter. Groundwater encountered within this area is normally under unconfined, water-table conditions and is most susceptible to contamination. Groundwater movement in sandstone aquifers primarily is along bedding planes, but joints and fractures provide avenues for the vertical movement of water. In 2008, irrigation accounted for 43 percent of water pumped from the aquifer, and municipal supply accounted for 47 percent. Edwards Aquifer Map Viewer. These aquifers are located in El Paso and Hudspeth counties in far West Texas and occur in Tertiary and Quaternary basin-fill deposits that extend northward into New Mexico and westward into Mexico. 500--Sandstone and carbonate-rock aquifers. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. Although its primary use is for municipalities, it is also used for irrigation, livestock, and other domestic purposes. Several agencies are investigating playa recharge and agricultural re-use projects over the aquifer. Water Use. Until recently, San Antonio was one of the largest cities in the world that relied solely on a single groundwater source for its municipal supply. About 55 percent of all water used in Texas was sourced through aquifers in 2019. The Ogallala Aquifer is the largest aquifer in the United States and is a major aquifer of Texas underlying much of the High Plains region. In general, groundwater is fresh but very hard in the outcrop of the aquifer. Texas Water Development Board works best with JavaScript enabled, 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). Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. Whether you are a teacher or home-school parent, you will find our Teacher's Guide to be an invaluable tool for teaching all things Texas to your students. This website compiles USGS resources and data related to principal aquifers including Aquifer Basics, principal aquifers maps and GIS data, and the National Aquifer Code Reference List. Official websites use .gov 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. Be retrieved using this search criteria the Texas water Development Board works best with JavaScript enabled an article, feedback... 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