aquifers in texas by countyaquifers in texas by 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. The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. 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. Freshwater saturated thickness averages 95 feet. The principal aquifer in Uvalde County is the Edwards and associated limestones of Cretaceous age. Where the Glen Rose thins or is absent, the Twin Mountains and Paluxy formations coalesce to form the Antlers Formation. 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 ). Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. 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. Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. 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]. Last fall while exploring for oil and gas deposits in southwest Texas, a driller instead found a huge freshwater deep aquifer. Texas has numerous aquifers capable of producing groundwater for households, municipalities, industry, farms, and ranches. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. 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. 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. 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. Major Aquifers of Texas [Map] Author: Texas Water Development Board (TWDB) Year: 2006: Document Number: 1295: HCP EIS Reference: . 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. 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. The lower, more permeable part of the aquifer produces the greatest amount of groundwater. It consists of the Hooper, Simsboro, and Calvert Bluff formations of the Wilcox Group and the overlying Carrizo Formation of the Claiborne Group. Click any position on the map to reveal attributes for a specific location. 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. 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. Refer to the metadata for a complete description of the files and how they were generated. The Ground Water Atlas of the United States is available onlineas anHTML website, asdownloadable PDFs, andoravailable for purchasethrough the USGS Store. New and Environmentally Improved. Conservation districts are promoting more-efficient irrigation techniques, and market-based, voluntary transfers of unused agricultural water rights to municipal uses are more common. (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.". The presence of contaminants in a source water can constrain its suitability for drinking. 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. San Antonio 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. Elsewhere, the aquifer supplies fresh but hard water for municipal, domestic, and livestock use. The EAA has an active program to educate the public on water conservation and also operates several active groundwater recharge sites. Water is generally hard and contains dissolved-solids concentrations ranging from less than 300 to more than 5,000 parts per million. The Maverick Aquifer, as it's been named, lies more than a mile deep under parts of Maverick, Uvalde, Dimmit and Kinney Counties. . ; 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 . The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic. 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. Several agencies are investigating playa recharge and agricultural re-use projects over the aquifer. 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. 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. Aquifers in carbonate rocks are most extensive in the eastern U.S. Irrigation accounts for more than half of the aquifer's discharge. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. The Carrizo-Wilcox Aquifer has long been utilized by private well owners, municipalities, agricultural producers and industry. Texas Water Development Board works best with JavaScript enabled. 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. 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. Secure .gov websites use HTTPS 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 Geologic Atlas of Texas illustrates the surface extent of geologic formations (and aquifers) across the state. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. Click any position on the map to reveal attributes for a specific location. 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. Irrigation was the principal use in Medina and Uvalde counties. Official websites use .gov 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. Water levels in several counties in this region are very low due to over-pumping. The Aggregate Water-Use Data System (AWUDS) is the database management system used to enter, store, and analyze state aggregate water-use data. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. 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. Aquifers play a major role in providing water to many parts of Texas. 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. Dell City irrigation from the Bone SpringVictorio Peak minor aquifer in Hudspeth County. Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. This area corresponds to the principal recharge zone for the aquifers. Sandstone aquifers can be highly productive and provide large volumes of water. Additionalhydrogeologicand groundwater recharge data is available through theRegional Groundwater Availability Studiesof theNational Water Census. About 55 percent of all water used in Texas was sourced through aquifers in 2019. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. 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. About 55 percent of all water used in Texas was sourced through aquifers in 2019. For the location tool click on the map to get coordinates for a particular location. A two-dimensional map representation of the principal aquifers of the Nation is shown below. Official websites use .gov 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. Select the area, distance or location tool below. 300--Sandstone aquifers. Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. Guadalupe runs dry with rainfall scarce. Years of heavy pumpage have caused significant water-level declines in portions of the aquifer. The effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. However, water quality diminishes to the south, where large areas contain total dissolved solids in excess of 1,000 milligrams per liter. He got the county through the crisis, and thanks to some heavy rains in 2012, the aquifer rebounded a little. In 2008, almost 96 percent of the water pumped from the Ogallala was used for irrigation. 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. Freshwater saturated thickness averages 95 feet. Find out the correct way to pronounce Mexiaalong with hundreds of other places all across Texasby downloading our helpful Pronunciation Guide In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. Search and browse the first 148 years of the Texas Almanac, hosted on the UNT Portal to Texas History. The U.S. Geological Survey prepared this dataset in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groun Water from the Antlers portion is used mainly for irrigation in the outcrop area of North and Central Texas. Texas Water Development Board works best with JavaScript enabled. Historically, Texas has had a wealth of fresh to slightly saline water, which underlies more than 81 percent of the state. Most of the carbonate-rock aquifers consist of limestone, but dolomite and marble locally yield water. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. The aquifer is used for municipal, industrial, and irrigation purposes. The Ogallala Formation of late Miocene to early Pliocene age consists of heterogeneous sequen-ces of coarse-grained sand and gravel in the lower part, grading upward into clay, silt, and fine sand. 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). 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. 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. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. Beets will help keep Bexar County roads from freezing this week. For Geophysical Well Log assistance contact. Declines continue in Ward County due to increased municipal and industrial pumping. 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. In most places where these two rock types are interbedded, the carbonate rocks yield much more water than the sandstone. Texas Gulf Coast Groundwater and Land Subsidence Over Forty Years of Research in the Houston-Galveston Region. Water-use data collected using this list of aquifers will be published in. 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. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. 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