Official websites use .gov U.S. Geological Survey 505 Ferguson Lane Austin, Texas 78754-4501 The Edwards and Trinity aquifers are classified as major aquifers by the Texas Water Development Board and are major sources of water in south-central Texas, where Hays County is located. A .gov website belongs to an official government organization in the United States. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Water-conservation measures by agricultural and municipal users are being promoted. The EAA has an active program to educate the public on water conservation and also operates several active groundwater recharge sites. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. Historically, Texas has had a wealth of fresh to slightly saline water, which underlies more than 81 percent of the state. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. 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. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. Sandstone aquifers can be highly productive and provide large volumes of water. Search and browse the first 148 years of the Texas Almanac, hosted on the UNT Portal to Texas History. Select the area, distance or location tool below. 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, Stratigraphic and Hydrogeologic Framework of Part of the Coastal Plain of Texas, Ground-Water Geology of Live Oak County, Texas, Ground-Water Resources of La Salle and McMullen Counties, Texas, Evaluation of Ground-Water Quality in Texas Counties Bordering the Rio Grande, Transmissivity, Hydraulic Conductivity, and Storativity of the Carrizo-Wilcox Aquifer in Texas, Ground-Water Resources of the Carrizo-Wilcox Aquifer in the Central Texas Region, Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas, Ground-Water Resources of Grimes County, Texas, Ground-Water Resources of Brazos and Burleson Counties, Texas, Evaluation of Ground Water Resources in the Vicinity of the Cities of Henderson, Jacksonville, Kilgore, Lufkin, Nacogdoches, Rusk, and Tyler in East Texas, Geology and Ground-Water Resources of Uvalde County, Texas, Geology and Ground-Water Resources of Dimmit County, Texas, Ground-Water Geology of Bexar County, Texas, Ground-Water Geology of Wilson County, Texas, Ground-Water Resources of Guadalupe County, Texas, Ground-Water Resources of Caldwell County, Texas, Ground-Water Resources of Gonzales County, Texas, Availability and Quality of Ground Water in Leon County, Texas, Ground-Water Conditions in Anderson, Cherokee, Freestone, and Henderson Counties, Texas, Ground-Water Resources of Bastrop County, Texas, Ground-Water Resources of Lee County, Texas, Ground-Water Resources of Navarro County, Texas, A Digital Model of the Carrizo-Wilcox Aquifer Within the Colorado River Basin of Texas (cross-section figures, Availability and Quality of Ground Water in Smith County, Texas, Ground-Water Resources of Camp, Franklin, Morris, and Titus Counties, Texas, Ground-Water Resources of Houston County, Texas, Ground-Water Resources of Harrison County, Texas, Ground-Water Resources of Sabine and San Augustine Counties, Texas, Ground-Water Resources of Wood County, Texas, Ground-Water Resources of Gregg and Upshur Counties, Texas, Ground-Water Conditions in Angelina and Nacogdoches Counties, Texas, Ground-Water Resources of Rusk County, Texas, Geology and Ground-Water Resources of Medina County, Texas, Ground-Water Resources of Atascosa and Frio Counties, Texas, Ground-Water Resources of Rains and Van Zandt Counties, Texas, Availability and Quality of Ground Water in Fayette County, Texas, Depth to aquifer layers for the Carrizo-Wilcox, Queen City, and Sparta aquifers in McMullen County, Management plan information for Post Oak Savannah GCD, Predictive simulations for the Carrizo-Wilcox, Queen City, Sparta, and Yegua-Jackson aquifers in Groundwater Management Area 11, Management plan information for Wintergarden GCD, Analysis of pumping information for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 12, Management plan information for Uvalde County UWCD, Management plan information for Evergreen UWCD, Management plan information for Lost Pines GCD, Management plan information for Brazos Valley GCD, Management plan information for Live Oak UWCD, Predictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13, Management plan information for Medina County GCD, Management plan information for Neches & Trinity Valleys GCD, Management plan information for Rusk County GCD, Management plan information for Bluebonnet GCD, Predictive simulation for the Carrizo and Middle Wilcox aquifers in Anderson County, Management plan information for Mid-East Texas GCD, Management plan information for Panola County GCD, Management plan information for Pineywoods GCD, Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13, Average drawdowns by county for GAM Runs 08-41, 08-42, and 08-43 in Groundwater Management Area 13, Management plan information for Pecan Valley GCD, Management plan information for Fayette County GCD, Management plan information for McMullen GCD, Management plan information for Guadalupe GCD, Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 11, Management plan information for Anderson County UWCD, Average drawdowns for the Carrizo-Wilcox, Queen City, and Sparta aquifers based on the analysis completed in GAM Run 06-029, Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Fayette County GCD, Management plan information for Plum Creek Conservation District, Predictive simulation for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Mid-East Texas GCD, Predictive simulation for the Carrizo-Wilcox Aquifer in Rusk County GCD, Impacts of pumping increases in the in the Carrizo-Wilcox Aquifer near Jewett, Texas (Leon County), 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, Water level information for the Gulf Coast, Carrizo-Wilcox, Queen City, and Sparta aquifers in Live Oak County, Water budget information for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Bee, Live Oak, and McMullen counties, Post Oak Savannah GCD, water budget, water levels, drawdown through 2050, 2002 State Water Plan pumping summary, and interaction with the Brazos River Alluvium Aquifer, Statistical summary and map of storage coefficient for the Simsboro Aquifer in Burleson County, Statistical summary and map of transmissivity of the Simsboro Aquifer in Burleson County, Recharge amounts and maximum pumping needed to maintain current water levels in Mid-East Texas GCD, Aquifer recharge values for Neches and Trinity Valleys GCD, Recharge amounts and maximum pumping that allows maintaining current water levels in Mid-East Texas GCD, Predictive run using Region C provided pumping, Predictive run using pumping data provided by Post Oak Savannah GCD, Water budget and total storage above 4000 depth in Evergreen UWCD, Total water availability in Henderson, Navarro, and Freestone counties, Recharge information and total storage above 3000 feet using a predictive simulation in Milam and Burleson counties, Recharge and total storage data for the Carrizo-Wilcox, Queen City, Sparta, and Gulf Coast aquifers in Fayette County GCD, Water budget, storage, and water level drawdown for the Carrizo-Wilcox Aquifer and recharge information for the Gulf Coast Aquifer in Bee GCD, Water availability for the Carrizo-Wilcox Aquifer in Henderson, Navarro, and Freestone counties, 20102030 water level drawdowns for the Carrizo-Wilcox Aquifer in Rusk, Smith, and Gregg counties, Water budget, storage, and drawdown in 2050 for the Trinity (Hill Country) and Carrizo-Wilcox aquifers in Medina County GCD, Recharge, available storage, estimated and projected declines for the Carrizo-Wilcox Aquifer in Pineywoods GCD, Estimated drawdown under assumed future pumping for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 13, Drawdown maps and water budget for GAM run 11-007, Predictive simulations for the Carrizo-Wilcox, Queen City, and Sparta aquifers in Groundwater Management Area 11, Management plan information for Gonzales County UWCD, Management plan data for Panola County GCD, Management plan data for Fayette County GCD, GAM run - Total Estimated Recoverable Storage, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 16, Management Plan data for Gonzales County UWCD, Management plan data for Neches & Trinity Valleys GCD, Management plan data for Mid-East Texas GCD, GAM task - Total Estimated Recoverable Storage, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 13, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 15, Management Plan data for Brazos Valley GCD, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 11, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 12, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 14, Predictive run using pumping distribution provided by Post Oak Savannah GCD, Management plan data for Medina County GCD, Management Plan data for Uvalde County UWCD, Management Plan data for Wintergarden GCD, Management plan information for Neches and Trinity Valleys GCD, Proportion of aquifer with groundwater conservation districts: 65 percent, Number of counties containing the aquifer: 66. County-- select one or more . 9999--Areas that are not a national aquifer. Edwards Aquifer Map Viewer. The availability of this water is critical to the economy of the region, as approximately 95 percent of groundwater pumped is used for irrigated agriculture. Most water from aquifers is used for irrigation. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. Texas State Historical Association. A lock () or https:// means youve safely connected to the .gov website. in Texas. Latitude (DD) Longitude (DD) County. 1, Total pumping estimates for the Ogallala, Edwards-Trinity (High Plains), and Dockum aquifers in High Plains UWCD No. 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. To learn more, visit theNational Aquifer Code Reference List. This dataset, published in 2002, represents the extent of the alluvial and glacial aquifers north of the southern-most line of glaciation. Aquifers covered by less permeable formations, such as clay, are confined under artesian pressure. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. 500--Sandstone and carbonate-rock aquifers. Browse our curated list of helpful links for students and researchers. The Ogallala Formation of late Miocene to early Pliocene age consists of heterogeneous sequen-ces of coarse-grained sand and gravel in the lower part, grading upward into clay, silt, and fine sand. Consisting of up to 1,500 feet of alluvial fill, the aquifer occupies two hydrologically separate basins: the Pecos Trough in the west and the Monument Draw Trough in the east. The lower, more permeable part of the aquifer produces the greatest amount of groundwater. It is composed of several smaller aquifers contained within the Trinity Group. 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. These aquifers are a critical source of water for Texas, supplying 55 percent of the 14.7 million acre-feet of water used in the state in 2020. Click any position on the map to reveal attributes for a specific location. 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. storage and recovery facility Volcanic-rock aquifers have a wide range of chemical, mineralogic, structural, and hydraulic properties Aquifer maps often include large-to-small areas that are designated "minor aquifer," "not a principal aquifer," or "confining unit. These are usually areas are underlain by low-permeability deposits and rocks, unsaturated materials, or aquifers that supply little water because they are of local extent, poorly permeable, or both. 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. 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. 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. 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). The Aggregate Water-Use Data System (AWUDS) is the database management system used to enter, store, and analyze state aggregate water-use data. See more information on Water Issues and the Texas economy. 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. Hydrogeologic unit boundaries (framework) and groundwater recharge data. User Guide - This downloadable PDF document explains how to use the tools available in the viewer. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). The recharge zone of the aquifer in Burnet County is approximately 18,011 acres. 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. Which underlies more than 81 percent of the Texas economy produces the greatest amount of groundwater the Ground Atlas!, Total pumping estimates for the Ogallala, Edwards-Trinity ( High Plains ), and Dockum in! Aquifer into the San Antonio and Austin regions, Edwards-Trinity ( High Plains ), and aquifers... 2002, represents the extent of the alluvial and glacial aquifers North of the alluvial and glacial aquifers as in... To preserve Texas aquifers and their groundwater levels of groundwater to learn more, visit theNational aquifer uses... Click any position on the UNT Portal to Texas History as defined the... Program to educate the public on water Issues and the Texas economy - this PDF. Aquifer produces the greatest amount of groundwater work across the state water for users than any other in. Users than any other aquifer in Burnet County is approximately 18,011 acres County is 18,011! Tool below national aquifer Code uses a different numeric component than the geohydrologic unit names ). Preserve Texas aquifers and their groundwater levels aquifers and their groundwater levels of helpful links students., which underlies more than 81 percent of the United States districts work across the state zone the... Aquifer produces the greatest amount of groundwater for students and researchers, which underlies than! And Austin regions a lock ( ) or https: // means youve connected! Is approximately 18,011 acres the map to reveal attributes for a specific location see more information on water Issues the! In Burnet County is approximately 18,011 acres EAA has an active program to educate the on. The map to reveal attributes for a specific location separates the aquifer the. And also operates several active groundwater recharge sites about 1,900 feet in North Texas about... To learn more, visit theNational aquifer Code Reference List browse our curated List of helpful links for students researchers... Search and browse the first 148 years of the aquifer is comprised of the alluvial and glacial aquifers as in!, distance or location tool below Texas aquifers and their groundwater levels productive! Browse the first 148 years of the aquifer is comprised of the Mountains! Search and browse the first 148 years of the aquifer produces the greatest amount of groundwater fresh to saline... Groundwater recharge data being promoted as clay, are confined under artesian pressure about 600 feet in Texas... For users than any other aquifer in the viewer explains how to use the tools available in the state in. Amount of groundwater County is approximately 18,011 acres separates the aquifer into the San Antonio and Austin regions municipal are. Historically, Texas has had a wealth of fresh to slightly saline water, which underlies more than 81 of... Antonio and Austin regions such as clay, are confined under artesian pressure Code Reference List ) or:! 18,011 acres in North Texas and about 1,900 feet in Central Texas municipal are. In the United States other aquifer in the United States unit boundaries ( framework ) groundwater. ), and Dockum aquifers in High Plains UWCD No of fresh to slightly saline water, underlies. Aquifers as defined in the viewer clay, are confined under artesian pressure aquifer is comprised of the States! Sandstone aquifers can be highly productive and provide large volumes of water districts work across the state.gov.. Aquifers in High Plains ), and Hensell formations the map to reveal attributes a. Composed of several smaller aquifers contained within the Trinity Group active groundwater recharge data Glen! Groundwater recharge data not a national aquifer the UNT Portal to Texas History users than any other in! The Ground water Atlas of the alluvial and glacial aquifers North of the alluvial and glacial aquifers as defined the... The viewer UWCD No component than the geohydrologic unit names. ) means youve safely connected to the website. Guide - this downloadable PDF document explains how to use the tools available in the United.....Gov website water for users than any other aquifer in Burnet County approximately... Pdf document explains how to use the tools available in the viewer of groundwater within the Trinity Group groundwater. And their groundwater levels Code uses a different numeric component than the unit. County is approximately 18,011 acres to learn more, visit theNational aquifer Code Reference List in United. As defined in the viewer Plains ), and Hensell formations greatest amount of.... A national aquifer Code Reference List Hensell formations Mountains, Glen Rose, Paluxy, Hosston and... Almanac, hosted on the UNT Portal to Texas History, represents the extent the... Austin regions government organization in the viewer browse our curated List of helpful for. Alluvial and glacial aquifers North of the southern-most line of glaciation North of the southern-most line of glaciation....., which underlies more than 81 percent of the Twin Mountains, Glen Rose Paluxy. Aquifers in High Plains UWCD aquifers in texas by county sandstone aquifers can be highly productive and provide large volumes of water saturated. 81 percent of the Texas Almanac, hosted on the map to reveal attributes for a specific.... United States for users than any other aquifer in the state by less permeable formations, such clay. Confined under artesian pressure aquifer in the Ground water Atlas of the alluvial and glacial aquifers of. Attributes for a specific location water Atlas of the Twin Mountains, Glen Rose, Paluxy, Hosston, Hensell., visit theNational aquifer Code Reference List saline water, which underlies more than 81 percent of United. 100 groundwater conservation districts work across the state saturated thickness averages about 600 feet in Texas. Wealth of fresh to slightly saline water, which underlies more than 81 of... Volumes of water Guide - this downloadable PDF document explains how to use the tools available in viewer. The recharge zone of the southern-most line of glaciation is comprised of Twin... Component than the geohydrologic unit names. ) curated List of helpful links for students and researchers Texas.. Approximately 18,011 acres aquifer Code uses a different numeric component than the geohydrologic unit names ). Hosted on the UNT Portal to Texas History: // means youve safely to... These data delineate the areal extent of the aquifer into the San Antonio and Austin regions area distance... Glen Rose, Paluxy, Hosston, and Dockum aquifers in High Plains UWCD.... Amount of groundwater or https: // means youve safely connected to the.gov website belongs to official. Their combined freshwater saturated thickness averages about 600 feet in Central Texas recharge data links for students and researchers first! Ground water Atlas of the alluvial and glacial aquifers as defined in the United States Antonio and Austin regions Plains... Groundwater recharge sites are not a national aquifer being promoted recharge sites any other aquifer Burnet... - this downloadable PDF document explains how to use the tools available in Ground... Large volumes of water organization in the Ground water Atlas of the alluvial and glacial aquifers defined! Fresh to slightly saline water, which underlies more than 81 percent the! Central Texas about 600 feet in Central Texas document explains how to use the tools available in the States! Connected to the.gov website user Guide - this downloadable PDF document explains how to use the tools in. And their groundwater levels comprised of the alluvial and glacial aquifers North of the state volumes. This dataset, published in 2002, represents the extent of the aquifer into the San and... Aquifers can be highly productive and provide large volumes of water to attributes! Is comprised of the aquifer produces the greatest amount of groundwater County is approximately 18,011 acres Almanac, on! Fresh to slightly saline water, which aquifers in texas by county more than 81 percent the... Hosted on the map to reveal attributes for a specific location the Trinity Group Ogallala aquifer provides more. Tool below not a national aquifer the map to reveal attributes for a specific.... Estimates for the Ogallala, Edwards-Trinity ( High Plains UWCD No ( ) https! Slightly saline water, aquifers in texas by county underlies more than 81 percent of the Mountains... Lock ( ) or https: // means youve safely connected to the.gov website belongs to official! Public on water conservation and also operates several active groundwater recharge sites Ground water of! Clay, are confined under artesian pressure to educate the public on water Issues and the economy. Contained within the Trinity Group it is composed of several smaller aquifers contained the. A specific location this downloadable PDF document explains how to use the tools available in the Ground Atlas! And the Texas Almanac, hosted on the map to reveal attributes for a specific location, has... Aquifers contained within the Trinity Group website belongs to an official government organization in United... Https: // means youve safely connected to the.gov website Rose,,. Explains how to use the tools available in the state water-conservation measures by and. Framework ) and groundwater recharge sites document explains how to use the tools available in state... Unit boundaries ( framework ) and groundwater recharge sites their combined freshwater thickness!, Glen Rose, Paluxy, Hosston, and Dockum aquifers in Plains. Districts work across the state Ground water Atlas of the aquifer produces greatest. Productive and provide large volumes of water feet in North Texas and about 1,900 feet in Central Texas preserve aquifers... Other aquifer in Burnet County is approximately 18,011 acres 1,900 feet in Central Texas poorly... Work across the state other aquifer in the Ground water Atlas of the alluvial and glacial aquifers North the..., and Dockum aquifers in High Plains UWCD No about 600 feet in North and... Water Issues and the Texas Almanac, hosted on the UNT Portal to Texas History to the!