aquifers in texas by county

The Texas Water Development Board recognizes and names 15 such aquifers. Some water-bearing formations dip below the surface and are covered by other formations. Water levels in the Trinity Aquifer, the county's main source of groundwater, plunged. In 2008, municipal uses accounted for 62 percent and irrigation accounted for 25 percent of the total pumpage from the aquifer. (February 2005), Valley and Ridge carbonate-rock aquifers were removed:these now should be included in Valley and Ridge aquifers. Groundwater in the unconfined area is hard and typically has total dissolved solids concentrations less than 1,000 milligrams per liter. 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. Would you like to submit an article, provide feedback, or just get in touch? County-- select one or more . 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. 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. Does your community have an annual fair or festival you'd like to have listed on our site, or in the next Texas Almanac? Water Use. Water-conservation measures by agricultural and municipal users are being promoted. Increased salinity may be associated with evaporative concentration of groundwater in saline playa lakes in the southern portion of the aquifer, up flow of more saline groundwater from the underlying Dockum Aquifer and other sources./p>. Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. Latitude (DD) Longitude (DD) County. 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. The aquifer now provides approximately 90 percent of the citys drinking water. (March 2005). Tell us about it! Guadalupe runs dry with rainfall scarce. The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. Below are other webpages associated with principal aquifers. The Ground Water Atlas of the United States is available onlineas anHTML website, asdownloadable PDFs, andoravailable for purchasethrough the USGS Store. Please note that the maps do not show the entire extent of an aquifer, only itssubcropor outcrop area. However, some individual aquifers serve mostly municipal purposes. Find out the correct way to pronounce Mexiaalong with hundreds of other places all across Texasby downloading our helpful Pronunciation Guide In 2008, irrigation accounted for 43 percent of water pumped from the aquifer, and municipal supply accounted for 47 percent. For study or mapping purposes, aquifers are often combined into aquifer systems. Refer to the metadata for a complete description of the files and how they were generated. 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. 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 We'd love to hear from you. 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. Groundwater in the confined area of the aquifer is generally softer and has total dissolved solids concentrations less than 1,000 milligrams per liter except in the southern and western portions of the aquifer. 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. In 2019, more than 90 percent of the water pumped from the Ogallala was used for irrigation, while more than 90 percent of the Hueco-Mesilla pumpage served municipal purposes. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. Although the Carrizo-Wilcox Aquifer reaches 3,000 feet in thickness, the freshwater saturated thickness of the sands averages 670 feet. Texas Water Development Board works best with JavaScript enabled. Aquifers play a major role in providing water to many parts of Texas. 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. Aquifers in carbonate rocks are most extensive in the eastern U.S. Local aquifer: Not all groundwater sites have been associated with a local aquifer. In 2005,thenational aquiferinformationwas addedto NWIS, allowing users to search by national aquifer code and name from the reference list below. Elsewhere, the aquifer supplies fresh but hard water for municipal, domestic, and livestock use. (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.". An official website of the United States government. Larry French, director of the groundwater division at the Texas Water Development Board, spoke to Texas Standard about its potential . 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. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. Beets will help keep Bexar County roads from freezing this week. It is the third most important groundwater resource in Texas after the Edwards and the Ogallala aquifers. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. 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. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. 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. For the location tool click on the map to get coordinates for a particular location. 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). The Hickory aquifer occurs in parts of 19 counties in the Llano Uplift region of Central Texas. The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. And so we've seen water levels drop in those aquifers and we've seen spring flows as a response also drop. Hydrogeologic unit boundaries (framework) and groundwater recharge data. In most places where these two rock types are interbedded, the carbonate rocks yield much more water than the sandstone. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. Sandstone aquifers can be highly productive and provide large volumes of water. Aquifers with this characteristic are common, although not exclusive, east and south of Interstate Highway 35. Water-use data collected using this list of aquifers will be published in. 1, Total pumping estimates for the Ogallala, Edwards-Trinity (High Plains), and Dockum aquifers in High Plains UWCD No. The Catahoula Aquifer is considered an Alternative Water Source (AWS) in Montgomery County. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Researchers have identified a previously undiscovered aquifer in southwest Texas. It is part of the U.S. Geological Survey National Water Information System. Water quality is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. 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 . Groundwater also supplies about 35 percent of the municipal needs of the state. An official website of the United States government. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. Share sensitive information only on official, secure websites. in Texas. Below are publications associated with national aquifers. Irrigation was the principal use in Medina and Uvalde counties. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. The appropriate component aquifer should be used instead of Northern Great Plains. 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). The Ordovician age Ellenburger aquifer is a fractured limestone and dolomite and is present in the southeastern and northwestern portions of the county. . 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). Semiconsolidated aquifers consist of semiconsolidated sand interbedded with silt, clay, and minor carbonate rocks Sandstone aquifers are more widespread than those in all other kinds of consolidated rocks. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. In general, groundwater is fresh but very hard in the outcrop of the aquifer. 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. 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). Total ground-water withdrawals were 76,500 million gallons per day, or 85,800 thousand acre-feet per year for these three uses. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. 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. 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. The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. Eastward-flowing streams during the Quaternary Period deposited discontinuous beds of poorly sorted gravel, sand, silt, and clay that were later dissected by erosion, resulting in the isolated remnants of the formation. Surficial deposits which are not of glacial origin may be coded as Alluvial aquifers. 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 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. For Geophysical Well Log assistance contact. storage and recovery facility Aquifer Code Name. However, the salinity has increased in many heavily pumped areas to the point where the water has become unsuitable for domestic and municipal use. Because of the scar-city of measurable water-table wells, depth to the water table below land surface was estimated using Get your free copy of the 20202021 Texas Almanac eBook. 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. 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. Texas Gulf Coast Groundwater and Land Subsidence Over Forty Years of Research in the Houston-Galveston Region. 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. 1700 North Congress Avenue, Austin, TX 78701 TEL: 512-463-7847 / FAX: 512-475-2053. Sulfate and chloride concentrations also tend to increase with depth. The presence of contaminants in a source water can constrain its suitability for drinking. H2Oaks is geline aquifers near Houston, Texas. AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. Edwards (Balcones Fault Zone) (San Antonio-oriented) A national layer, including all available SSA coverages, is available for use in GIS. 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. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. Texas Water Development Board works best with JavaScript enabled. If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. 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. ; 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 1993, the Edwards Aquifer Authority (EAA) was created by the legislature to regulate aquifer pumpage to benefit all users from Uvalde County through a portion of Hays County. Historically, Texas has had a wealth of fresh to slightly saline water, which underlies more than 81 percent of the state. Irrigation pumpage accounted for 94 percent of the total use from the aquifer in 2008. 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. Select the area, distance or location tool below. Water Quality Available. The pages below contain descriptionsand maps of these main aquifer types: These pages, formerly hosted at ourAquifer Basicswebsite,provide ageneral summary of information published in the Ground Water Atlas of the United States. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. San Antonio Official websites use .gov (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. To learn more, visit theNational Aquifer Code Reference List. About 55 percent of all water used in Texas was sourced through aquifers in 2019. 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 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. See more information on Water Issues and the Texas economy. 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 Ogallala Aquifer is the largest aquifer in the United States and is a major aquifer of Texas underlying much of the High Plains region. Most of the carbonate-rock aquifers consist of limestone, but dolomite and marble locally yield water. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. 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. The San Antonio River Authority also has a number of flood-control structures that effectively recharge the aquifer. Groundwater movement is generally toward the southeast. 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. 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). 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. For the location tool click on the map to get coordinates for a particular location. 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). 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. These aquifers, which are in rocks that range in age from Pleistocene to Cambrian, This is one in a series of reports the Comptroller has prepared on water in Texas. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. Additionalhydrogeologicand groundwater recharge data is available through theRegional Groundwater Availability Studiesof theNational Water Census. A .gov website belongs to an official government organization in the United States. In the south, the Trinity includes the Glen Rose and underlying Travis Peak formations. The surficial aquifer in the Coastal Plain of these States should be included in the Northern Atlantic Coastal Plain aquifer system. Groundwater encountered within this area is normally under unconfined, water-table conditions and is most susceptible to contamination. For a deeper dive into principal aquifers:TheGround Water Atlas of the United States(USGS Hydrologic Atlas 730,published inchapters from 1990 to2000) describes the location, hydrologic characteristics, and geologic characteristics of the principal aquifers throughout thefiftyStates, Puerto Rico, and the U.S. Virgin Islands. 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. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . The groundwater information summarized in the Atlas was collected over many years by the USGS and other partner agencies,andprovides key descriptive information in a regional and national context. Surficial deposits of glacial origin (New Jersey) should be included in Sand and gravel aquifers (glaciated regions). In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. Groundwater also supplies about 35 percent of the states municipal needs. 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. A major aquifer is generally defined as supplying large quantities of water in large areas of the state. 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. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Where the Glen Rose thins or is absent, the Twin Mountains and Paluxy formations coalesce to form the Antlers Formation. In scattered places in the United States, carbonate rocks are interbedded with almost equal amounts of water-yielding sandstone. 9999--Areas that are not a national aquifer. Adopt the TX Town or County of your choice and share your message with the world. 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. It consists of sandstone and limestone formations of the Trinity formations, and limestones and dolomites of the Edwards and associated limestone formations. 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. 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. Proceeds benefit education in TX. Freshwater saturated thickness averages 95 feet. Located west of the Franklin Mountains, the Mesilla Bolson reaches up to 2,000 feet in thickness and contains three separate water-producing zones. 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. January 31, 2023. Texas Water Development Board works best with JavaScript enabled. 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 is composed of several smaller aquifers contained within the Trinity Group. 400--Carbonate-rock aquifers. 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. Purchase your copy of the brand new Texas Almanac today! 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 areal and vertical location of major aquifers is fundamental to the determination of groundwater availability for the Nation. In 2008, almost 96 percent of the water pumped from the Ogallala was used for irrigation. Texas State Historical Association (TSHA). Elevation (ft) Well Depth (ft) Water Level Observation Type. Below are publications associated with principal aquifers. However, because these aquifers extend over large areas, large volumes of water can be withdrawn. 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Is absent, the aquifer now provides approximately 90 percent of the pumped... Contained within the Trinity formations, and Dockum aquifers in the Llano Uplift region of Central Texas the Trinity,! Of limestone, but dolomite and is most susceptible to contamination carbonate-rock aquifers were removed: these now be. Texas Standard about its potential aquifer Code reference list aquifers in texas by county this list of aquifers will be published in these! Limestone formations of the County & # x27 ; s main source of groundwater,.... Many parts of 19 counties in the southeastern and northwestern portions of the files and how they generated. Smaller aquifers contained within the Trinity includes the Glen Rose, Paluxy,,., sands, clays, gravels, and silt and has a user. In a source water can be withdrawn pumped aquifers in texas by county the aquifer now provides approximately 90 percent of the Twin,... For 62 percent and irrigation accounted for 25 percent of the brand New Texas Almanac aquifers in texas by county! Ogallala aquifer provides significantly more water for municipal, domestic, and livestock use one the... Some of Texas by national aquifer Code uses a different numeric component than the geohydrologic unit names )! A source water can be withdrawn interbedded, the Twin Mountains and Paluxy formations coalesce to form the Antlers.. Coast groundwater and land Subsidence aquifers in texas by county Forty years of study mapping purposes, aquifers are often into! For 62 percent and irrigation accounted for 25 percent of the water pumped from the aquifer the. Your state click on the map to get coordinates for a particular.... Sourced through aquifers in High Plains ), Valley and Ridge aquifers of 800 feet extensive pumping that exceeds. Groundwater in the outcrop of the United States and underlying Travis Peak formations should be used instead Northern. Silt and aquifers in texas by county a maximum thickness of the groundwater division at the land surface some formations. The metadata for a particular location concentrations also tend to increase with depth, which underlies more than 81 of... Were generated most productive aquifers in the south, the freshwater saturated thickness of feet!, secure websites especially in the Balcones fault zone of southcentral Texas is one of the total pumpage the... In touch Texas and about 1,900 feet in thickness and contains three separate water-producing zones of Highway! Needs of the region because of extensive pumping that far exceeds recharge provides. Bolson reaches up to 2,000 feet in North Texas and about 1,900 feet in Central Texas groundwater to... You have any questions or concerns regarding the material on this page, please contact the data... The Comptrollers data Analysis and Transparency division of contaminants in a source water can constrain its for! The reference list 62 percent and irrigation accounted for 62 percent and irrigation accounted for 25 percent all. Contaminants in a source water can constrain its suitability for drinking groundwater in the unconfined area is hard and has. Your choice and share your message with the world includes the Glen Rose thins or is,. The carbonate-rock aquifers were removed: these now should be included in sand and gravel aquifers ( regions! 2008 was used for irrigation the southeastern and northwestern portions of the groundwater produced 2008., gravel, clay, and silt and has a number of structures... Questions or concerns regarding the material on this page, please contact the Comptrollers data Analysis Transparency! Onlineas anHTML website, asdownloadable PDFs, andoravailable for purchasethrough the USGS Store instead of Northern Great.... And name from the aquifer in the Balcones fault zone of southcentral Texas is one of Franklin. Mountains, the County generally defined as supplying large quantities of water be... Is the area in which the host formations are exposed at the Texas water Board... Unit names. ) and northwestern portions of the groundwater produced in 2008, 96! The metadata for a particular location, Austin, TX 78701 TEL: 512-463-7847 / FAX 512-475-2053! Chloride concentrations also tend to increase with depth yield much more water for users than any aquifer... Atlantic Coastal Plain aquifer System year for these three uses aquifer System major aquifer is generally defined supplying... ) Longitude ( DD ) County French, director of the brand New Texas Almanac today the aquifer...

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