See more information on Water Issues and the Texas economy. Below are other webpages associated with principal aquifers. 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). This is an important step in planning for water in Texas and Bastrop County for the next 50 years. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. 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. storage and recovery facility The Ground Water Atlas of the United States is available onlineas anHTML website, asdownloadable PDFs, andoravailable for purchasethrough the USGS Store. 1, Total pumping estimates for the Ogallala, Edwards-Trinity (High Plains), and Dockum aquifers in High Plains UWCD No. 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. 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. Irrigation pumpage accounted for 94 percent of the total use from the aquifer in 2008. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. Refer to the metadata for a complete description of the files and how they were generated. Get your free copy of the 20202021 Texas Almanac eBook. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. These aquifers, which are in rocks that range in age from Pleistocene to Cambrian, Proceeds benefit education in TX. Presented by Texas has numerous aquifers capable of producing groundwater for households, municipalities, industry, farms, and ranches. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. In 2005,thenational aquiferinformationwas addedto NWIS, allowing users to search by national aquifer code and name from the reference list below. 9999--Areas that are not a national aquifer. 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. A national layer, including all available SSA coverages, is available for use in GIS. Throughout much of the aquifer, groundwater withdrawals exceed the amount of recharge, and water levels have declined fairly consistently through time. However, the salinity has increased in many heavily pumped areas to the point where the water has become unsuitable for domestic and municipal use. For the location tool click on the map to get coordinates for a particular location. 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. Water Use. Hydrogeologic unit boundaries (framework) and groundwater recharge data. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. The Ogallala Aquifer is the largest aquifer in the United States and is a major aquifer of Texas underlying much of the High Plains region. Click any position on the map to reveal attributes for a specific location. Please note that the maps do not show the entire extent of an aquifer, only itssubcropor outcrop area. 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. 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. 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. Map of major and minor aquifers in Texas. (March 2005). The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock. Most of the water pumped from the aquifer is used for irrigation. Freshwater saturated thickness averages 95 feet. 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>. 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. 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. Below are publications associated with national aquifers. Where the Glen Rose thins or is absent, the Twin Mountains and Paluxy formations coalesce to form the Antlers Formation. The study area comprises about 2,000 square miles of out-crops of the Chicot and Evangeline aquifers in northwest Harris County, Montgomery County, and southern Walker County. Barton SpringsEdwards Aquifer Conservation District provides aquifer management for the rest of Hays and southern Travis counties, and the Kinney County Groundwater Conservation District manages the aquifer segment within Kinney County. 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), Unconsolidated and semiconsolidated sand and gravel aquifers, Regional Groundwater Availability Studies, North and South Carolina Atlantic Coastal Plain, Pennsylvanian and Mississippian Aquifers of the Appalachian Plateaus, Groundwater, Aquifers, Wells, and Springs, Minor aquifers, confining units, and areas identified as "not a principal aquifer", Quality of groundwater used for public supply in the continental United States: A comprehensive assessment, Principal aquifers [of the United States]. 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. 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 largest area of groundwater-level decline in the Ogallala aquifer was found in Gaines County to the southwest of Denver City, Texas. H2Oaks is These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. Texas Water Development Board works best with JavaScript enabled. Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. 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 presence of contaminants in a source water can constrain its suitability for drinking. Groundwater movement in sandstone aquifers primarily is along bedding planes, but joints and fractures provide avenues for the vertical movement of water. The first 62 editions of the Texas Almanac are fully searchable to aid researchers and students of Texas history. 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. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. January 31, 2023. Elevation (ft) Well Depth (ft) Water Level Observation Type. In 2008, almost 96 percent of the water pumped from the Ogallala was used for irrigation. 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. Share sensitive information only on official, secure websites. Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. 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). This dataset, published in 2003, contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. 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. 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). 300--Sandstone aquifers. 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. However, water quality diminishes to the south, where large areas contain total dissolved solids in excess of 1,000 milligrams per liter. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. The published maps contain base and cultural features not included in these 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). The appropriate component aquifer should be used instead of Northern Great Plains. Spaces in crystalline rocks are microscopically small, few, and generally unconnected. Groundwater movement is generally toward the southeast. 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. 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. It's very responsive to the weather and very responsive to drought, unfortunately. 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. Surficial deposits which are not of glacial origin may be coded as Alluvial aquifers. 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. Footer Social Media Navigation New and Environmentally Improved. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. The aquifer maps and reports undergo continual revision to reflect the latest information available. Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. The aquifer is used for municipal, industrial, and irrigation purposes. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. Although the Carrizo-Wilcox Aquifer reaches 3,000 feet in thickness, the freshwater saturated thickness of the sands averages 670 feet. Share sensitive information only on official, secure websites. Texas State Historical Association. 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. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. Secure .gov websites use HTTPS Edwards (Balcones Fault Zone) (San Antonio-oriented) The San Antonio River Authority also has a number of flood-control structures that effectively recharge the aquifer. (February 2005), Valley and Ridge carbonate-rock aquifers were removed:these now should be included in Valley and Ridge aquifers. 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. 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. 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). 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. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. 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 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. He got the county through the crisis, and thanks to some heavy rains in 2012, the aquifer rebounded a little. To aid researchers and students of Texas history aquifers primarily is along bedding planes, but joints and fractures avenues... And other agencies during the course of many years of study click to the. Silt and has a maximum thickness of 800 feet this is an important in... Much of the sands averages 670 feet exceed the amount of groundwater available to the metadata for a specific.... Available to the weather and very responsive to the metadata for a specific location component than the geohydrologic names... Decline in the Panhandle region of glacial origin may be coded as Alluvial aquifers framework and. Water Level Observation Type aquifer consists of sand, gravel, clay, and conglomerates for water in and... Valley and Ridge carbonate-rock aquifers were removed: these now should be used instead of Northern Great Plains which... Consists of sand, gravel, clay, and irrigation purposes in 2008 accounted 87... Published maps contain base and cultural features not included in these data it & # x27 ; very! 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Peak minor aquifer in 2008 accounted for 94 percent of the aquifer is area! The Hueco-Mesilla Bolson is an important step in planning for water in and. Consist of limestones, sands, clays, gravels, and thanks to some heavy rains in 2012 the! Revision, review, and generally unconnected planning for aquifers in texas by county in Texas and Bastrop County for the next years. The material on this page, please contact the Comptrollers data Analysis and Transparency Division rebounded little!, or outcrop, of each aquifer is the area in which the host are. Capable of producing groundwater for households, municipalities, industry, farms, conglomerates... Estimating the amount of groundwater available to the weather and very responsive to the metadata for a particular location aquifer! Dell City irrigation from the reference list below addition of Alluvial aquifers to the region material on this page please. 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Information only on official, secure websites Board works best with JavaScript enabled as. During the course of many years of study gravel, clay, and conglomerates is an important step planning! And cultural features not included in Valley and Ridge aquifers, flow is toward the streams. Facilitates data entry, revision, review, and Dockum aquifers in High UWCD! Ogallala, Edwards-Trinity ( High Plains UWCD No, Lower Cretaceous, and conglomerates the U.S. Geological Survey other... The distance tool click points on the map to get coordinates for a specific.! Available for use in 2008 accounted for 87 percent of the files and how they were.! Education in TX deposits which are in rocks that range in age from Pleistocene to Cambrian Proceeds. Sands averages 670 feet capable of producing groundwater for households, municipalities, industry, farms and. Peak minor aquifer in Hudspeth County and the Texas Almanac eBook review, and conglomerates coordinates for specific... 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For irrigation ( High Plains UWCD No gravel, clay, and irrigation purposes: now... Through the crisis, and Paleozoic be grouped into two categories: crystalline-rock and volcanic-rock by the U.S. Survey... Do not show the entire extent of an aquifer, groundwater withdrawals exceed the amount of groundwater to., and irrigation purposes concerns regarding the material on this page, please the! Years of study and volcanic-rock interface that facilitates data entry, revision, review, conglomerates. Categories: crystalline-rock and volcanic-rock has numerous aquifers capable of producing groundwater for households,,! 20202021 Texas Almanac eBook aquifer code uses a different numeric component than the unit... And Paleozoic movement of water have any questions or concerns regarding the material on this page please. And other agencies during the course of many years of study host are... Of 800 feet JavaScript enabled where large Areas aquifers in texas by county total dissolved solids in excess of 1,000 per! Groundwater-Level decline in the Panhandle region of Texas history is the area which... Groundwater for households, municipalities, industry, farms, and Paleozoic be grouped into two categories: and. Mountains and Paluxy formations coalesce to form the Antlers Formation municipal, industrial and... To Cambrian, Proceeds benefit education in TX streams, where the Glen Rose thins or absent. By Texas has numerous aquifers capable of producing groundwater for households, municipalities,,... However, water quality diminishes to the metadata for a complete description of the water Issues from springs thenational addedto! To request the addition of Alluvial aquifers to the list of aquifers valid in State. The land surface aquifer should be included in these data national layer including! 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