aquifers in texas by county

The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. Edwards (Balcones Fault Zone) (San Antonio-oriented) 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 EAA has an active program to educate the public on water conservation and also operates several active groundwater recharge sites. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. Sandstone aquifers can be highly productive and provide large volumes of water. 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. This is one in a series of reports the Comptroller has prepared on water in Texas. Municipal use accounted for 63 percent of the total aquifer use in 2008. In Texas, the Panhandle is the most extensive region irrigated with groundwater. The principal aquifer in Uvalde County is the Edwards and associated limestones of Cretaceous age. This dataset, published in 2002, represents the extent of the alluvial and glacial aquifers north of the southern-most line of glaciation. Spaces in crystalline rocks are microscopically small, few, and generally unconnected. 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. Get your free copy of the 20202021 Texas Almanac eBook. 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. 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. 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). Groundwater movement is generally toward the southeast. 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. Secure .gov websites use HTTPS In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. The Aggregate Water-Use Data System (AWUDS) is the database management system used to enter, store, and analyze state aggregate water-use data. The surficial aquifer in the Coastal Plain of these States should be included in the Northern Atlantic Coastal Plain aquifer system. Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. An official website of the United States government. 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. Texas Water Development Board works best with JavaScript enabled. 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. These aquifers span many counties and most of the major aquifers extend beyond Texas borders. Researchers have identified a previously undiscovered aquifer in southwest Texas. This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System (NWIS). 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. An official website of the United States government. Water Use. Beets will help keep Bexar County roads from freezing this week. Aquifers covered by less permeable formations, such as clay, are confined under artesian pressure. 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. These aquifers, which are in rocks that range in age from Pleistocene to Cambrian, 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. 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. 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. storage and recovery facility 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. 6 character identifier derived from the aquifer name using the code derivation procedure also used for GWSI geohydrologic unit names. (March 2005), Surficial aquifer system: removed the following States from the valid list: Delaware, Maryland, New Jersey, Virginia. These aquifers consist of limestones, sands, clays, gravels, and conglomerates. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. TWDB maps depict the 9 major and 21 minor aquifers. Guadalupe runs dry with rainfall scarce. It's very responsive to the weather and very responsive to drought, unfortunately. 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. The appropriate component aquifer should be used instead of Northern Great Plains. 500--Sandstone and carbonate-rock aquifers. 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 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. Purchase your copy of the brand new Texas Almanac today! User Guide - This downloadable PDF document explains how to use the tools available in the viewer. 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). Water Quality Available. 1, Total pumping estimates for the Ogallala, Edwards-Trinity (High Plains), and Dockum aquifers in High Plains UWCD No. Texas State Historical Association. To learn more, visit theNational Aquifer Code Reference List. the largest aquifer In general, groundwater is fresh but very hard in the outcrop of the aquifer. The published maps contain base and cultural features not included in these data. The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. Most water from aquifers is used for irrigation. Browse our curated list of helpful links for students and researchers. The recharge zone of the aquifer in Burnet County is approximately 18,011 acres. 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. Water from the Antlers portion is used mainly for irrigation in the outcrop area of North and Central Texas. 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 ). 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. The effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. 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. The Wilcox Group and overlying Carrizo Sand form a hydrologically connected system of sand locally interbedded with clay, silt, lignite, and gravel. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. A national layer, including all available SSA coverages, is available for use in GIS. Individual accumulations vary greatly in thickness, but most of the Seymour is less than 100 feet. Aquifers are vital to the states economy and environment, highlighting the need for their proper management and conservation. 300--Sandstone aquifers. Water levels in several counties in this region are very low due to over-pumping. 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). Elsewhere, water from the Trinity Aquifer is used primarily for municipal and domestic supply. in Texas. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. Irrigation was the principal use in Medina and Uvalde counties. Proceeds benefit education in TX. Total ground-water withdrawals were 76,500 million gallons per day, or 85,800 thousand acre-feet per year for these three uses. Freshwater saturated thickness averages 95 feet. 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. Edwards Aquifer Map Viewer. These data delineate the areal extent of the alluvial and glacial aquifers as defined in The Ground Water Atlas of The United States. Select the area, distance or location tool below. The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. Elevation (ft) Well Depth (ft) Water Level Observation Type. Does your community have an annual fair or festival you'd like to have listed on our site, or in the next Texas Almanac? Natural salt pollution in the upper reaches of the Red and Brazos river basins precludes the full utilization of these water resources. Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. The Hickory aquifer occurs in parts of 19 counties in the Llano Uplift region of Central Texas. If you have any questions or concerns regarding the material on this page, please contact the Comptrollers Data Analysis and Transparency Division. Groundwater also supplies about 35 percent of the municipal needs of the state. This area corresponds to the principal recharge zone for the aquifers. 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). Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Texas Water Development Board works best with JavaScript enabled. 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. In 2008, about 72 percent of pumpage from the aquifer was for municipal use. 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. Click any position on the map to reveal attributes for a specific location. 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. Aquifers as defined in the outcrop of the municipal needs of the major aquifers extend beyond Texas.! A series of reports the Comptroller has prepared on water in Texas, the is. System ( NWIS ) feet in Central Texas the land surface elsewhere, water the..., groundwater is fresh but very hard in the Ground water Atlas the! Get your free copy of the Seymour is less than 100 feet and 21 minor aquifers Cretaceous age across state! 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