Computer models of the northern and southern portions of the Ogallala aquifer were completed by the Texas Water Development Board and its contractor. 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. Historically, Texas has had a wealth of fresh to slightly saline water, which underlies more than 81 percent of the state. Texas Water Development Board works best with JavaScript enabled. Water Quality Available. The aquifer also feeds several well-known recreational springs and underlies some of Texas most environmentally sensitive areas. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. the largest aquifer The map layer was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series Ground Water Atlas of the United States. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. About 55 percent of all water used in Texas was sourced through aquifers in 2019. Does your community have an annual fair or festival you'd like to have listed on our site, or in the next Texas Almanac? Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. Footer Social Media Navigation Water levels in several counties in this region are very low due to over-pumping. Summary 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. 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). Secure .gov websites use HTTPS Located west of the Franklin Mountains, the Mesilla Bolson reaches up to 2,000 feet in thickness and contains three separate water-producing zones. Aquifers play a major role in providing water to many parts of Texas. 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. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. Groundwater movement is generally toward the southeast. 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. Official websites use .gov The aquifer is used for municipal, industrial, and irrigation purposes. National aquifers, or principal aquifers of the United States, are defined as regionally extensive aquifers or aquifer systems that have the potential to be used as a source of potable(drinkable)water. January 31, 2023. Share sensitive information only on official, secure websites. 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. 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. 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). About 32 percent of water used to meet municipal demands is from groundwater. The Edwards aquifer in the Balcones fault zone of southcentral Texas is one of the most permeable and most productive aquifers in the world. 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. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . The Trinity Aquifer consists of basal Cretaceous-age Trinity Group formations extending through 61 counties from the Red River in North Texas to the Hill Country of Central Texas. The San Antonio River Authority also has a number of flood-control structures that effectively recharge the aquifer. Water Systems Declines continue in Ward County due to increased municipal and industrial pumping. storage and recovery facility Refer to the metadata for a complete description of the files and how they were generated. In cooperation with Harris-Galveston Subsidence District, the City of Houston, Fort Bend County Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District, the U.S. Geological Survey Texas Water Science Center Gulf Coast . 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 is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. 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. It is part of the U.S. Geological Survey National Water Information System. Texas State Historical Association (TSHA). Irrigation pumpage accounted for 94 percent of the total use from the aquifer in 2008. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. For study or mapping purposes, aquifers are often combined into aquifer systems. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. Find out the correct way to pronounce Mexiaalong with hundreds of other places all across Texasby downloading our helpful Pronunciation Guide Presented by The Geologic Atlas of Texas illustrates the surface extent of geologic formations (and aquifers) across the state. 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. The recharge zone of the aquifer in Burnet County is approximately 18,011 acres. 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. It consists of sandstone and limestone formations of the Trinity formations, and limestones and dolomites of the Edwards and associated limestone formations. 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. A major aquifer is generally defined as supplying large quantities of water in large areas of the state. Years of heavy pumpage have caused significant water-level declines in portions of the aquifer. Individual accumulations vary greatly in thickness, but most of the Seymour is less than 100 feet. Irrigation, mainly in the northwestern portion of the region, accounted for about 79 percent of total aquifer use in 2008 and has resulted in significant water-level declines in Glasscock and Reagan counties. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. (February 2005), Valley and Ridge carbonate-rock aquifers were removed:these now should be included in Valley and Ridge aquifers. Irrigation accounts for more than half of the aquifer's discharge. There are nine major aquifers and 22 minor aquifers that supply groundwater for municipal and irrigation needs throughout the state. 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. Major Aquifers; Minor Aquifers; BRACS Study Areas; Regional Water Planning Areas; Groundwater Management Areas; Groundwater Conservation Districts; River Basins; Texas Counties; 7.5' USGS Grid; 2.5' State Grid; Base Maps 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. Some water-bearing formations dip below the surface and are covered by other formations. Proceeds benefit education in TX. TWDB maps depict the 9 major and 21 minor aquifers. Page Contact Information: Texas Water Data Maintainer Page Last Modified: 2023-02-25 01:14:50 EST This aquifer consists of isolated areas of alluvium found in parts of 25 north-central and Panhandle counties in the upper Red River and Brazos River basins. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. Texas has three ASR systems. For the location tool click on the map to get coordinates for a particular location. User Guide - This downloadable PDF document explains how to use the tools available in the viewer. 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. This dataset, published in 2002, represents the extent of the alluvial and glacial aquifers north of the southern-most line of glaciation. 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. Latitude (DD) Longitude (DD) County. 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. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). The Carrizo-Wilcox Aquifer is located beneath 66 counties in the northeast region of the Rio Grande Valley in South Texas to Arkansas and Louisiana. Secure .gov websites use HTTPS Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. Excessive pumping has lowered the water level, particularly in the artesian portion of the Winter Garden District of Atascosa, Dimmit, Frio, LaSalle, and Zavala counties and in the municipal and industrial areas of Angelina, Nacogdoches, and Smith counties. (March 2005). The aquifer underlies an extensive area in south-central Texas extending along the Balcones fault zone from Kinney County eastward to San Antonio, and thence northeastward to Hays County. Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock. The U.S. Geological Survey prepared this dataset in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groun Refer to the metadata for a complete description of the files and how they were generated. Water in the aquifer occurs in fractures, honeycomb zones (or intergranular pores), and solution channels in the Edwards and associated limestone formations of Cretaceous age. The Trinity Aquifer consists of basal Cretaceous-age Trinity Group formations extending through 61 counties from the Red River in North Texas to the Hill Country of Central Texas. The Wilcox Group and overlying Carrizo Sand form a hydrologically connected system of sand locally interbedded with clay, silt, lignite, and gravel. There are nine major aquifers and 22 minor aquifers that supply groundwater for municipal and irrigation needs throughout the state. El Paso, however, has reduced its use of groundwater from the Hueco Bolson since 1989, and observation wells indicate that water levels have stabilized. Major Aquifers; Minor Aquifers; BRACS Study Areas; Regional Water Planning Areas; Groundwater Management Areas; Groundwater Conservation Districts; River Basins; Texas Counties; 7.5' USGS Grid; 2.5' State Grid; Base Maps In general, groundwater is fresh but very hard in the outcrop of the aquifer. It's very responsive to the weather and very responsive to drought, unfortunately. 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. Throughout much of the aquifer, groundwater withdrawals exceed the amount of recharge, and water levels have declined fairly consistently through time. Select the area, distance or location tool below. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. The Texas Water Development Board (TWDB) has identified and characterized nine major and 20 minor aquifers in the state based on the quantity of water supplied by each. 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. 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. January 31, 2023. 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. 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. Tell us about it! Elevation (ft) Well Depth (ft) Water Level Observation Type. Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. However, because these aquifers extend over large areas, large volumes of water can be withdrawn. 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. Several agencies are investigating playa recharge and agricultural re-use projects over the aquifer. A two-dimensionalmap representation of the principal aquiferswas derived from this data and published as part of the National Atlas in 1998 (revised 2003). The Ordovician age Ellenburger aquifer is a fractured limestone and dolomite and is present in the southeastern and northwestern portions of the county. Water-level declines in excess of 200 feet have occurred in Reeves and Pecos counties but have slowed since the mid-1970s with the decrease in irrigation pumpage. Freshwater saturated thickness averages 95 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. The aquifer maps and reports undergo continual revision to reflect the latest information available. Aquifers play a major role in providing water to many parts of Texas. Below are publications associated with national aquifers. This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System (NWIS). See more information on Water Issues and the Texas economy. 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. Texas Water Development Board works best with JavaScript enabled. 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. In 2008, about 72 percent of pumpage from the aquifer was for municipal use. Researchers have identified a previously undiscovered aquifer in southwest Texas. Water is generally hard and contains dissolved-solids concentrations ranging from less than 300 to more than 5,000 parts per million. 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. 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. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. Hydrogeologic unit boundaries (framework) and groundwater recharge data. The principal aquifers shown on the 2003 map above, with some additions, were used as the first National Aquifer reference list in the USGS National Water Information System (NWIS) in the Aggregate Water Use Data System (database released in August 2001). 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 Texas Water Development Board recognizes and names 15 such aquifers. 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. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. Adopt the TX Town or County of your choice and share your message with the world. If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. 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. 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. San Antonio 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. 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. In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. The Hickory aquifer occurs in parts of 19 counties in the Llano Uplift region of Central Texas. 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 . In 2008, 72 percent of groundwater pumped from the aquifer was used for irrigation, and the rest is withdrawn for industrial uses, power supply, and municipal use. Note that alluvial aquifers north of the limit of continental glaciation are included inSand and gravel aquifers (glaciated regions). In general, groundwater is fresh but very hard in the outcrop of the aquifer. Throughout most of its extent in Texas, the aquifer yields fresh to slightly saline water that is used mainly for irrigation in the Winter Garden District of South Texas, and for public supply and industrial use in Central and Northeast Texas. About 55 percent of all water used in Texas was sourced through aquifers in 2019. 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). The Gulf Coast aquifer forms an irregularly shaped belt that parallels the Texas coastline and extends through 54 counties from the Rio Grande northeastward to the Louisiana border. In most places where these two rock types are interbedded, the carbonate rocks yield much more water than the sandstone. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. In Texas, a minor aquifer is defined as one that supplies large quantities of water in small areas or small quantities of water in large areas. Official websites use .gov 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. 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. 94 percent of the Edwards aquifer in Burnet County is approximately 18,011 acres be grouped two... Pumpage have caused significant water-level Declines in portions of the aquifer most productive aquifers in 2019 Board and its.... Uplift region of the aquifer in Hudspeth County environmentally sensitive areas recreational springs underlies. Aquifer & # x27 ; s very responsive to the southwest latest information available the material on this,... The most permeable and most productive aquifers in the Ground water Atlas of Trinity... Needs throughout the state and volcanic-rock about 72 percent of the total use from the Bone SpringVictorio Peak aquifer... To build line segments to measure and double click to complete the measurement is generally defined as supplying quantities. 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