Please note that the maps do not show the entire extent of an aquifer, only itssubcropor outcrop area. Freshwater saturated thickness averages 95 feet. In scattered places in the United States, carbonate rocks are interbedded with almost equal amounts of water-yielding sandstone. Elsewhere, water from the Trinity Aquifer is used primarily for municipal and domestic supply. Would you like to submit an article, provide feedback, or just get in touch? AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. 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. Conservation districts are promoting more-efficient irrigation techniques, and market-based, voluntary transfers of unused agricultural water rights to municipal uses are more common. Does your community have an annual fair or festival you'd like to have listed on our site, or in the next Texas Almanac? Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. 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. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. 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. Select the area, distance or location tool below. 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. This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System (NWIS). The Edwards aquifer in the Balcones fault zone of southcentral Texas is one of the most permeable and most productive aquifers in the world. This map, which was derived fromGround Water Atlas of the United Statesdata (published as part of the National Atlas in 1998, revised 2003) indicates the areal extent of the uppermost principal aquifers on a national scale. Water quality generally ranges from fresh to slightly saline. This area corresponds to the principal recharge zone for the aquifers. Aquifers covered by less permeable formations, such as clay, are confined under artesian pressure. Anaquiferis a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs. Larry French, director of the groundwater division at the Texas Water Development Board, spoke to Texas Standard about its potential . Edwards Aquifer Map Viewer. Last fall while exploring for oil and gas deposits in southwest Texas, a driller instead found a huge freshwater deep aquifer. This document provides information on the basic functions of AWUDS and the steps f, Fresh ground-water withdrawals from 66 principal aquifers in the United States were estimated for irrigation, public-supply, and self-supplied industrial water uses for the year 2000. Groundwater also supplies about 35 percent of the states municipal needs. ; Metadata - The Edwards Aquifer maps were developed from official printed maps that contain regulatory boundaries based on geologic interpretations of the Edwards Aquifer zonesthat is, the recharge, transition, and contributing within the transition zones, as . 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 (for map of minor aquifers, click). 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. 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. Map of major and minor aquifers in Texas. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. 1700 North Congress Avenue, Austin, TX 78701 TEL: 512-463-7847 / FAX: 512-475-2053. 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. There are 13 major and 20 minor aquifers; in the Hill Country, the major aquifers are the Edwards and the three water-producing zones of the Trinity. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. Guadalupe runs dry with rainfall scarce. 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). 1, Total pumping estimates for the Ogallala, Edwards-Trinity (High Plains), and Dockum aquifers in High Plains UWCD No. . 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. Total ground-water withdrawals were 76,500 million gallons per day, or 85,800 thousand acre-feet per year for these three uses. 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 appropriate component aquifer should be used instead of Northern Great Plains. Secure .gov websites use HTTPS Revisions to the reference list since it was first used by NWIS: Northern Great Plains aquifer system was removed:this umbrella term includes four national aquifers but is not considered a national aquifer itself. He got the county through the crisis, and thanks to some heavy rains in 2012, the aquifer rebounded a little. 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. The Edwards (BFZ) aquifer forms a narrow belt extending through 13 counties from a groundwater divide in Kinney County through the San Antonio area northeastward to the Leon River in Bell County. Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock. The Ground Water Atlas of the United States is available onlineas anHTML website, asdownloadable PDFs, andoravailable for purchasethrough the USGS Store. Aprincipal aquiferis defined as a regionally extensive aquifer or aquifer system that has the potential to be used as a source of potable (drinkable) water. Texas Gulf Coast Groundwater and Land Subsidence Over Forty Years of Research in the Houston-Galveston Region. Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. 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. Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. 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. New and Environmentally Improved. Below are publications associated with principal aquifers. About 55 percent of all water used in Texas was sourced through aquifers in 2019. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. The effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. Footer Social Media Navigation The quality of groundwater used for public supply was assessed in 25 principal aquifers (PAs) that account for 84% of groundwater pumped for public supply in the U.S. (89.6 million people on a proportional basis). In general, groundwater is fresh but very hard in the outcrop of the aquifer. The Aggregate Water-Use Data System (AWUDS) is the database management system used to enter, store, and analyze state aggregate water-use data. Texas Water Development Board works best with JavaScript enabled. 6 character identifier derived from the aquifer name using the code derivation procedure also used for GWSI geohydrologic unit names. In Texas, the Panhandle is the most extensive region irrigated with groundwater. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. Although water level declines in excess of 300 feet have occurred in several areas over the last 50 to 60 years, the rate of decline has slowed, and water levels have risen in a few areas. For Geophysical Well Log assistance contact. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. Texas Water Development Board works best with JavaScript enabled. Historical large-scale groundwater withdrawals, especially for the municipal uses of El Paso and Juarez, have caused major water-level declines and significantly changed the direction of flow, causing a deterioration of the chemical quality of the groundwater in the aquifer, according to El Paso Water Utilities and the USGS. For an overview ofprincipalaquifers:The principal water-yielding aquifers of North America can be grouped into five types by rock type and location: unconsolidated and semiconsolidated sand and gravel aquifers, sandstone aquifers, carbonate-rock aquifers, aquifers in interbedded sandstone and carbonate rocks, and aquifers in igneous and metamorphic rocks. TWDB maps depict the 9 major and 21 minor aquifers. Water quality in the Carrizo-Wilcox Aquifer shows isolated areas of slightly saline to moderately saline groundwater in the eastern and central portions of the aquifer and more widespread areas of slightly to moderately saline groundwater in the southwest. (.pdf file). Water Tour | Aquifers Overview | Print Snapshot (PDF). El Paso, however, has reduced its use of groundwater from the Hueco Bolson since 1989, and observation wells indicate that water levels have stabilized. 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. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. The EAA has an active program to educate the public on water conservation and also operates several active groundwater recharge sites. Such sites will not be retrieved using this search criteria. 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. Water-use data collected using this list of aquifers will be published in. 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. User Guide - This downloadable PDF document explains how to use the tools available in the viewer. 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. Hydrogeologic unit boundaries (framework) and groundwater recharge data. County State Well Number Aquifer Aquifer Type Entity/Cooperator Period of Record Wheeler : 0529711 : Ogallala : Unconfined : Texas Water Development Board 2006-07-18 to 2012-08-15: Carson . Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. Aquifers are vital to the states economy and environment, highlighting the need for their proper management and conservation. Latitude (DD) Longitude (DD) County. It consists of sandstone and limestone formations of the Trinity formations, and limestones and dolomites of the Edwards and associated limestone formations. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). 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. A .gov website belongs to an official government organization in the United States. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. For the location tool click on the map to get coordinates for a particular location. Note that alluvial aquifers north of the limit of continental glaciation are included inSand and gravel aquifers (glaciated regions). However, water quality diminishes to the south, where large areas contain total dissolved solids in excess of 1,000 milligrams per liter. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Refer to the metadata for a complete description of the files and how they were generated. They are grouped into four categories: basin-fill, blanket sand and gravel, glacial-deposit, and stream-valley aquifers. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group.
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