Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. There are nine major aquifers and 22 minor aquifers that supply groundwater for municipal and irrigation needs throughout the state. Texas has three ASR systems. 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. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Aquifers with this characteristic are common, although not exclusive, east and south of Interstate Highway 35. N or S, where N = aquifer, S = aquifer system, 3 digit number = rock type (4 digits used for "Other" to fill out the code), 100-- Sand and gravel aquifers200--Semiconsolidatedsand aquifers (not used)300--Sandstone aquifers400--Carbonate-rock aquifers500--Sandstone and carbonate-rock aquifers600--Igneous and metamorphic-rock aquifers9999--Areas that are not a national aquifer, 6 character identifier derived from the aquifer name using thecode derivation procedure also used for GWSI geohydrologic unit names. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. Latitude (DD) Longitude (DD) County. If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. Conservation districts are promoting more-efficient irrigation techniques, and market-based, voluntary transfers of unused agricultural water rights to municipal uses are more common. The Edwards aquifer in the Balcones fault zone of southcentral Texas is one of the most permeable and most productive aquifers in the world. Select the area, distance or location tool below. Additionalhydrogeologicand groundwater recharge data is available through theRegional Groundwater Availability Studiesof theNational Water Census. 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. The aquifer maps and reports undergo continual revision to reflect the latest information available. Would you like to submit an article, provide feedback, or just get in touch? 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). 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. The Hueco Bolson, located on the eastern side of the Franklin Mountains, consists of up to 9,000 feet of clay, silt, sand, and gravel and is an important source of drinking water for both El Paso and Juarez, Mexico. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Browse our curated list of helpful links for students and researchers. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. County-- select one or more . . 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. Note that alluvial aquifers north of the limit of continental glaciation are included inSand and gravel aquifers (glaciated regions). 600--Igneous and metamorphic-rock aquifers. It is absent in a broad area extending from the north central portion of the county continuing to the south, southwest part of Gillespie County. 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. 1, Management plan information for Gateway GCD, Predictive simulations for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 7, Predictive simulation for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 2, Management plan information for Llano Estacado UWCD, Management plan information for Garza County UWCD, Management plan information for Sandy Land UWCD, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area 1, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area2, Initial and final water volumes for the simulations presented in GAM Run 08-085, Predictive simulation for the Ogallala Aquifer in Groundwater Management Area 2, Management plan information for Garza County Underground and FWCD, Management plan information for Mesa UWCD, Management plan information for Permian Basin UWCD, Management plan information for Panhandle GCD, Management plan information for Glasscock GCD, Management plan information for South Plains UWCD, Predictive simulations for the Ogallala Aquifer in Groundwater Management Area 2, Volume calculations for the Ogallala Aquifer in Groundwater Management Area 1, Volume calculations and pump rates for the Ogallala Aquifer in Groundwater Management Area 1, Analysis using specified depletions for districts in Groundwater Management Area 1, Management plan information for North Plains GCD, Water budget and GIS information for the Ogallala Aquifer in Hemphill County, Saturated thickness shapefile for the Ogallala Aquifer in Hemphill County, Saturated thickness shapefile for the Ogallala Aquifer in Hemphill County (zip file), Saturated thickness maps for the Ogallala Aquifer in Region A, Groundwater volumes for the Ogallala Aquifer in Randall and Oldham counties, Comparison of groundwater volumes between GR 04-13 and GR 05-09 for the Ogallala Aquifer in Region A, Saturated thickness, groundwater volumes, and water level maps for the Ogallala Aquifer in Region A, Various pumping scenarios for the Ogallala Aquifer in Hemphill County, Water budget and volume of water in storage for Hemphill County using a predictive simulation, Saturated thickness map for the Ogallala (north) Aquifer, Recharge rates per model cell in the Ogallala (north) Aquifer GAM, Groundwater in storage for Region A using a 1.25% annual depletion rate, Hydraulic conductivity data for the Ogallala Aquifer GAMs, Volumetric calculations for all counties in Llano Estacado Regional Water Planning Group, Groundwater volume in each county-basin zone of Region O (Llano Estacado), Determine pumping rate equivalent to a volume depletion rate of no more than 1% per year, Predictive run with Region O provided increase in irrigation pumping, Water table declines and water budget in South Plains UWCD, Groundwater volume in each county-basin zone of Region O (Llano Estacado) Clarification memo, Water budget and total available storage for the Ogallala Aquifer in Permian Basin UWCD, Volume of water in storage and recharge information for the Ogallala Aquifer in High Plains UWCD No. The effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. 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. However, because these aquifers extend over large areas, large volumes of water can be withdrawn. Water to the north of the Canadian River is generally fresh, with total dissolved solids typically less than 400 milligrams per liter. For the location tool click on the map to get coordinates for a particular location. Water quality is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. 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 availability of this water is critical to the economy of the region, as approximately 95 percent of groundwater pumped is used for irrigated agriculture. See more information on Water Issues and the Texas economy. 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. Elevation (ft) Well Depth (ft) Water Level Observation Type. 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. (March 2005). 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. A lock () or https:// means youve safely connected to the .gov website. Texas Water Development Board works best with JavaScript enabled. In 2008, almost 96 percent of the water pumped from the Ogallala was used for irrigation. Aquifers play a major role in providing water to many parts of Texas. The Aggregate Water-Use Data System (AWUDS) is the database management system used to enter, store, and analyze state aggregate water-use data. Because of the scar-city of measurable water-table wells, depth to the water table below land surface was estimated using 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. An official website of the United States government. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. 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. The aquifer also feeds several well-known recreational springs and underlies some of Texas most environmentally sensitive areas. In the south, the Trinity includes the Glen Rose and underlying Travis Peak formations. The presence of contaminants in a source water can constrain its suitability for drinking. 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. Surficial deposits of glacial origin (New Jersey) should be included in Sand and gravel aquifers (glaciated regions). 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. However, some individual aquifers serve mostly municipal purposes. . 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. 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). The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. 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. Refer to the metadata for a complete description of the files and how they were generated. 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. Parts of the aquifer in the Winter Garden area and portions of Brazos County are slightly to moderately saline, with total dissolved solids ranging from 1,000 to 7,000 milligrams per liter. Results of the Regional A, 12201 Sunrise Valley Drive Reston, VA 20192, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 12: Pacific Islands (American Samoa, Hawaii, Guam, Commonwealth of the Northern Mariana Islands), map representation of the principal aquifers, Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, Circular 1279,Estimated Withdrawals from Principal Aquifers in the United States, 2000, Groundwater, Aquifers, Wells, and Springs, Users Manual for the National Water Information System of the U.S. Geological Survey: Aggregate Water-Use Data System, Version 3.2, Estimated withdrawals from principal aquifers in the United States, 2000, Principal aquifers [of the United States], Arkansas, Colorado, Delaware, Kansas, Kentucky, Louisiana, Maryland, Missouri, Montana, Nebraska, New Jersey, North Dakota, Ohio, Oklahoma, South Dakota, Tennessee, Texas, Utah, Virginia, West Virginia, Wyoming, Arizona, California, Idaho, Nevada, New Mexico, Oregon, Utah, Illinois, Iowa, Michigan, Minnesota, Missouri, Wisconsin, Alabama, Florida, Louisiana, Mississippi, Texas, Arizona, Colorado, New Mexico, Utah, Wyoming, Connecticut, Maryland, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, Virginia, Alabama, Florida, Georgia, South Carolina, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, Wyoming, Iowa, Kansas, Minnesota, Montana, Nebraska, North Dakota, South Dakota, Wyoming, Montana, North Dakota, South Dakota, Wyoming, Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, Texas, Mississippi River Valley alluvial aquifer, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, Alabama, Illinois, Indiana, Iowa, Kentucky, Maryland, Missouri, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, New York and New England crystalline-rock aquifers, Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont, New York and New England carbonate-rock aquifers, Connecticut, Maine, Massachusetts, New Jersey, New York, Pennsylvania, Vermont, North Coast Limestone aquifer system (Puerto Rico), Northern Atlantic Coastal Plain aquifer system, Delaware, District of Columbia, Maryland, New Jersey, New York, North Carolina, Pennsylvania, Virginia, Northern Rocky Mountains Intermontane Basins aquifer systems, Arkansas, Illinois, Kansas, Missouri, Oklahoma, California, Idaho, Nevada, Oregon, Utah, Washington, Wyoming, California, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming, Minnesota, Montana, North Dakota, South Dakota, Wyoming, Alabama, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, Piedmont and Blue Ridge carbonate-rock aquifers, Maryland, New Jersey, North Carolina, Pennsylvania, Piedmont and Blue Ridge crystalline-rock aquifers, Alabama, Delaware, District of Columbia, Georgia, Maryland, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, Tennessee, Virginia, West Virginia, Sand and gravel aquifers (glaciated regions), Connecticut, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New York, North Dakota, Ohio, Pennsylvania, Rhode Island, South Dakota, Vermont, Wisconsin, Illinois, Indiana, Iowa, Kentucky, Michigan, Missouri, Ohio, Tennessee, Wisconsin, Southeastern Coastal Plain aquifer system, Alabama, Georgia, Mississippi, South Carolina, Tennessee, Alabama, Florida, Georgia, North Carolina, South Carolina, Alabama, Georgia, Maryland, New Jersey, New York, North Carolina, Pennsylvania, Tennessee, Virginia, West Virginia, First publication of the core of the national aquifer list in a comprehensive manner was the, Aquifers shown on the 2003 Principal Aquifers map, with some additions, were used as the first National Aquifer reference list in NWIS, released in AWUDS v. 1.0 for the national compilation of water-use data for the year 2000 (database released in August 2001). (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). Presented by 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. 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 first 62 editions of the Texas Almanac are fully searchable to aid researchers and students of Texas history. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. 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). Extending from the Rio Grande in South Texas northeastward into Arkansas and Louisiana, the Carrizo-Wilcox aquifer provides water to all or parts of 66 counties. 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. The Wilcox Group and overlying Carrizo Sand form a hydrologically connected system of sand locally interbedded with clay, silt, lignite, and gravel. Water-conservation measures by agricultural and municipal users are being promoted. Adopt the TX Town or County of your choice and share your message with the world. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. The aquifer is primarily composed of sand locally interbedded with gravel, silt, clay, and lignite. 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. In general, groundwater is fresh but very hard in the outcrop of the aquifer. The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. Groundwater movement is generally toward the southeast. Water Use. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. 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. Proceeds benefit education in TX. Map of major and minor aquifers in Texas. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. 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