The Ordovician age Ellenburger aquifer is a fractured limestone and dolomite and is present in the southeastern and northwestern portions of the county. 1, Water table decline maps for the Ogallala Aquifer in South Plains UWCD, Water budget and total available storage for the Ogallala Aquifer in Garza County UFWCD, Water budget and total available storage for the Ogallala Aquifer in Mesa UWCD, Terry county water budget for the Ogallala Aquifer, Predictive simulations for the Ogallala and Edwards-Trinity (High Plains) aquifers in Groundwater Management Area 2, Management plan data for North Plains GCD, Groundwater Recharge in the Central High Plains of Texas: Roberts and Hemphill Counties, Revised management plan data for North Plains GCD, Management plan data for Garza County UWCD, GAM task - Total Estimated Recoverable Storage, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 1, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 2, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 3, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 6, Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 7, Total Estimated Recoverable Storage by county for aquifers in High Plains UWCD No. This map, which was derived fromGround Water Atlas of the United Statesdata (published as part of the National Atlas in 1998, revised 2003) indicates the areal extent of the uppermost principal aquifers on a national scale. 600--Igneous and metamorphic-rock aquifers. This website compiles USGS resources and data related to principal aquifers including Aquifer Basics, principal aquifers maps and GIS data, and the National Aquifer Code Reference List. Aquifers are vital to the states economy and environment, highlighting the need for their proper management and conservation. Some of these declines have resulted in significant land-surface subsidence, particularly in the Houston-Galveston area. 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. Below are publications associated with principal aquifers. 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. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. The competition for ground water from the Edwards aquifer has created some controversial water issues in central Texas. Larry French, director of the groundwater division at the Texas Water Development Board, spoke to Texas Standard about its potential . This is an important step in planning for water in Texas and Bastrop County for the next 50 years. It's very responsive to the weather and very responsive to drought, unfortunately. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Texas Water Development Board works best with JavaScript enabled. It consists of sandstone and limestone formations of the Trinity formations, and limestones and dolomites of the Edwards and associated limestone formations. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. 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. In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. 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 play a major role in providing water to many parts of Texas. 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. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. 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). 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. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. Aquifers play a major role in providing water to many parts of Texas. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Additional aquifer data through the USGS web app Although the Carrizo-Wilcox Aquifer reaches 3,000 feet in thickness, the freshwater saturated thickness of the sands averages 670 feet. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. The appropriate component aquifer should be used instead of Northern Great Plains. Groundwater also supplies about 35 percent of the states municipal needs. County-- select one or more . 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). 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. For Geophysical Well Log assistance contact. Get your free copy of the 20202021 Texas Almanac eBook. Edwards Aquifer Map Viewer. Texas State Historical Association. Surficial deposits of glacial origin (New Jersey) should be included in Sand and gravel aquifers (glaciated regions). In Texas, the Panhandle is the most extensive region irrigated with groundwater. Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. Footer Social Media Navigation There are nine major aquifers and 22 minor aquifers that supply groundwater for municipal and irrigation needs throughout the state. 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. In the south, the Trinity includes the Glen Rose and underlying Travis Peak formations. The Ogallala aquifer extends through 48 counties of the Texas Panhandle and is the southernmost extension of the largest aquifer (High Plains aquifer) in North America. Texas has three ASR systems. 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). Groundwater also supplies about 35 percent of the municipal needs of the state. 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. The Geologic Atlas of Texas illustrates the surface extent of geologic formations (and aquifers) across the state. Below are publications associated with national aquifers. 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. 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. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. This aquifer underlies the Edwards Plateau, extending through 40 counties from the Hill Country of Central Texas westward to the Trans-Pecos region. About 55 percent of all water used in Texas was sourced through aquifers in 2019. 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. The EAA has an active program to educate the public on water conservation and also operates several active groundwater recharge sites. 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. 300--Sandstone aquifers. User Guide - This downloadable PDF document explains how to use the tools available in the viewer. Several agencies are investigating playa recharge and agricultural re-use projects over the aquifer. Natural salt pollution in the upper reaches of the Red and Brazos river basins precludes the full utilization of these water resources. For the location tool click on the map to get coordinates for a particular location. Texas State Historical Association (TSHA). Aquifers covered by less permeable formations, such as clay, are confined under artesian pressure. 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 effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. It is composed of several smaller aquifers contained within the Trinity Group. The published maps contain base and cultural features not included in these data. Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. 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 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. Page Contact Information: Texas Water Data Maintainer Page Last Modified: 2023-02-25 01:14:50 EST The aquifer also feeds several well-known recreational springs and underlies some of Texas most environmentally sensitive areas. 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. 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