The appropriate component aquifer should be used instead of Northern Great Plains. 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. A two-dimensional map representation of the principal aquifers of the Nation is shown below. Years of heavy pumpage have caused significant water-level declines in portions of the aquifer. About 32 percent of water used to meet municipal demands is from groundwater. In most places where these two rock types are interbedded, the carbonate rocks yield much more water than the sandstone. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. Aquifers in carbonate rocks are most extensive in the eastern U.S. And so we've seen water levels drop in those aquifers and we've seen spring flows as a response also drop. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. 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. Such sites will not be retrieved using this search criteria. Sandstone aquifers can be highly productive and provide large volumes of water. The surficial aquifer in the Coastal Plain of these States should be included in the Northern Atlantic Coastal Plain aquifer system. Some of the state's largest water level declines, ranging from 350 to more than 1,000 feet, have occurred in counties along the IH-35 corridor from McLennan County to Grayson County. Below are publications associated with principal aquifers. Refer to the metadata for a complete description of the files and how they were generated. Texas Gulf Coast Groundwater and Land Subsidence Over Forty Years of Research in the Houston-Galveston Region. 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. Water quality is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. Conservation districts are promoting more-efficient irrigation techniques, and market-based, voluntary transfers of unused agricultural water rights to municipal uses are more common. 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 aquifer is one of the most extensive and highly used groundwater resources in Texas. ASR is the process of capturing water from heavy rainfall and injecting it into underground water wells where it is stored for later use. 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). 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. 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. 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. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. Surficial deposits of glacial origin (New Jersey) should be included in Sand and gravel aquifers (glaciated regions). (.pdf file). 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. Water from the Antlers portion is used mainly for irrigation in the outcrop area of North and Central Texas. Groundwater also supplies about 35 percent of the states municipal needs. 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. Official websites use .gov A national layer, including all available SSA coverages, is available for use in GIS. 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. 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. This dataset documents the depth to groundwater measured in wells screened in the Chicot, Evangeline, and Jasper aquifers in the Houston-Galveston region, Texas for 2019. Water Tour | Aquifers Overview | Print Snapshot (PDF). The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. The recharge zone of the aquifer in Burnet County is approximately 18,011 acres. Get your free copy of the 20202021 Texas Almanac eBook. This aquifer underlies the Edwards Plateau, extending through 40 counties from the Hill Country of Central Texas westward to the Trans-Pecos region. This area corresponds to the principal recharge zone for the aquifers. The presence of contaminants in a source water can constrain its suitability for drinking. The San Antonio River Authority also has a number of flood-control structures that effectively recharge the aquifer. A lock () or https:// means youve safely connected to the .gov website. Natural salt pollution in the upper reaches of the Red and Brazos river basins precludes the full utilization of these water resources. The Texas Water Development Board recognizes and names 15 such aquifers. Water to the north of the Canadian River is generally fresh, with total dissolved solids typically less than 400 milligrams per liter. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. geline aquifers near Houston, Texas. Surficial deposits which are not of glacial origin may be coded as Alluvial aquifers. Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. 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. 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. . 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. 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. Click any position on the map to reveal attributes for a specific location. Map of major and minor aquifers in Texas. Share sensitive information only on official, secure websites. 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. Irrigation pumpage accounted for 94 percent of the total use from the aquifer in 2008. 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. 6 character identifier derived from the aquifer name using the code derivation procedure also used for GWSI geohydrologic unit names. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. 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 . 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). About 55 percent of all water used in Texas was sourced through aquifers in 2019. Spaces in crystalline rocks are microscopically small, few, and generally unconnected. However, the salinity has increased in many heavily pumped areas to the point where the water has become unsuitable for domestic and municipal use. Aquifer Code Name. In 2008, municipal uses accounted for 62 percent and irrigation accounted for 25 percent of the total pumpage from the aquifer. This is an important step in planning for water in Texas and Bastrop County for the next 50 years. 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. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Water Quality Available. This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System (NWIS). Aquifers shown on the 2003PrincipalAquifers map, with some additions, were used as the first National AquiferReferenceList in the USGSNational Water Information System(NWIS) in theAggregate Water Use Data System(AWUDS,database released in August 2001). AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. Texas has numerous aquifers capable of producing groundwater for households, municipalities, industry, farms, and ranches. ; 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 . In general, groundwater is fresh but very hard in the outcrop of the aquifer. 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. Entriesinitalicsare no longer valid.To learn more about a specific aquifer, visit the Principal Aquifers websitefor an overview, or access more extensive information from theGround Water Atlas of the United States. 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. 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 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). Groundwater also supplies about 35 percent of the municipal needs of the state. Browse our curated list of helpful links for students and researchers. 500--Sandstone and carbonate-rock aquifers. The aquifer now provides approximately 90 percent of the citys drinking water. 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. 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. Freshwater saturated thickness averages 95 feet. 9999--Areas that are not a national aquifer. (in error) Northern Great Plains aquifer system, Some revisions to the lists of valid States, this code, and reference list were added to the NWIS Site File and toNWISWebwith the release of NWIS 4.5 in 2005; see the WMA Technical Memo "NWIS 4.5 -- Assigning National Aquifer Codes in the Ground Water Site Inventory (GWSI) for the NWIS 4.5 Release.". Aquifers with this characteristic are common, although not exclusive, east and south of Interstate Highway 35. 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. 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. Most of the water pumped from the aquifer is used for irrigation. For the location tool click on the map to get coordinates for a particular location. 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. 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