aquifers in texas by county

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. It's very responsive to the weather and very responsive to drought, unfortunately. Located west of the Franklin Mountains, the Mesilla Bolson reaches up to 2,000 feet in thickness and contains three separate water-producing zones. Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. (March 2005). Water Use. It consists of sandstone and limestone formations of the Trinity formations, and limestones and dolomites of the Edwards and associated limestone formations. 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), Texas Aquifers Study: Groundwater Quantity, Quality, Flow, and Contributions to Surface Water, An Investigation of Clouds and Precipitation for the Texas High Plains, Quantity and Chemical Quality of Low Flow in the Prairie Dog Town Fork Red River near Wayside, Texas, February 6-9,1968, Evaluating the Ground-Water Resources of the High Plains of Texas, Volumes 1-4, The High Plains Aquifer System of Texas, 1980 to 1990 - Overview and Projections, Evaluation of Ground-Water Resources in Dallam County, Texas, Evaluation of Enhanced Recharge Potential to the Ogallala Aquifer in the Brazos River Basin, Hale County, Texas, Updated Water-Quality Evaluation of the Ogallala Aquifer, Including Selected Metallic and Non-Metallic Inorganic Constituents, Studies of Playa Lakes in the High Plains of Texas, Geology and Ground-Water Resources of Hale County, Texas, Ground-Water Resources of Gaines County, Texas, Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas, Conference Proceedings: Aquifers of the Edwards Plateau, Water-Quality Evaluation of the Ogallala Aquifer, Texas, Evaluation of Ground-Water Resources in Briscoe, Hale, and Swisher Counties, Texas, Evaluation of Ground-Water Resources in the Southern High Plains of Texas, Ground-Water Resources of Collingsworth County, Texas, Ground-Water Resources of Hall and Eastern Briscoe Counties, Texas, Water-Level Changes in the High Plains Aquifer of Texas, 1980-1990, Management plan information for Hemphill County UWCD, Management plan information for High Plains UWCD No. TWDB maps depict the 9 major and 21 minor aquifers. It is the third most important groundwater resource in Texas after the Edwards and the Ogallala aquifers. Below are publications associated with principal aquifers. 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. 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. The aquifer is one of the most extensive and highly used groundwater resources in Texas. The appropriate component aquifer should be used instead of Northern Great Plains. 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. The lower, more permeable part of the aquifer produces the greatest amount of groundwater. 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. AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. The Texas Water Development Board recognizes and names 15 such aquifers. in Texas. Elsewhere, the aquifer supplies fresh but hard water for municipal, domestic, and livestock use. The Catahoula Aquifer is considered an Alternative Water Source (AWS) in Montgomery County. 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. 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. 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. Sulfate and chloride concentrations also tend to increase with depth. The Maverick Aquifer, as it's been named, lies more than a mile deep under parts of Maverick, Uvalde, Dimmit and Kinney Counties. Delineations of the downdip boundaries of such aquifers as the Edwards (BFZ), Trinity, and Carrizo-Wilcox are based on chemical quality criteria. In cooperation with Harris-Galveston Subsidence District, the City of Houston, Fort Bend County Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District, the U.S. Geological Survey Texas Water Science Center Gulf Coast . A two-dimensional map representation of the principal aquifers of the Nation is shown below. In 2008, municipal uses accounted for 62 percent and irrigation accounted for 25 percent of the total pumpage from the aquifer. Additional aquifer data through the USGS web app 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. In 2008, about 72 percent of pumpage from the aquifer was for municipal use. Refer to the metadata for a complete description of the files and how they were generated. 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. 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 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. 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. However, the salinity has increased in many heavily pumped areas to the point where the water has become unsuitable for domestic and municipal use. Unconsolidated sand and gravel aquifers are characterized by intergranular porosity and all contain water primarily under unconfined, or water-table, conditions. Texas State Historical Association. 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. In 2008, almost 96 percent of the water pumped from the Ogallala was used for irrigation. 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. Because of the scar-city of measurable water-table wells, depth to the water table below land surface was estimated using Groundwater in the unconfined area is hard and typically has total dissolved solids concentrations less than 1,000 milligrams per liter. 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. 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. Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. Local aquifer: Not all groundwater sites have been associated with a local aquifer. 500--Sandstone and carbonate-rock aquifers. The aquifer now provides approximately 90 percent of the citys drinking water. 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. Groundwater movement is generally toward the southeast. 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. Proceeds benefit education in TX. 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. 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. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. See more information on Water Issues and the Texas economy. Adopt the TX Town or County of your choice and share your message with the world. 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. Most water from aquifers is used for irrigation. Water is generally hard and contains dissolved-solids concentrations ranging from less than 300 to more than 5,000 parts per million. Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. Beets will help keep Bexar County roads from freezing this week. For Geophysical Well Log assistance contact. Surficial deposits which are not of glacial origin may be coded as Alluvial 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 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. Declines continue in Ward County due to increased municipal and industrial pumping. We are the premier source for trusted information about Texas. the largest aquifer 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. January 31, 2023. Some of these declines have resulted in significant land-surface subsidence, particularly in the Houston-Galveston area. 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. 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. This is an important step in planning for water in Texas and Bastrop County for the next 50 years. 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. Get your free copy of the 20202021 Texas Almanac eBook. Several agencies are investigating playa recharge and agricultural re-use projects over the aquifer. Water-use data collected using this list of aquifers will be published in. These aquifers are a critical source of water for Texas, supplying 55 percent of the 14.7 million acre-feet of water used in the state in 2020. Texas Water Development Board works best with JavaScript enabled. 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. Hydrogeologic unit boundaries (framework) and groundwater recharge data. Most of the carbonate-rock aquifers consist of limestone, but dolomite and marble locally yield water. 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. 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 movement in sandstone aquifers primarily is along bedding planes, but joints and fractures provide avenues for the vertical movement of water. Throughout most of its extent in Texas, the aquifer yields fresh to slightly saline water that is used mainly for irrigation in the Winter Garden District of South Texas, and for public supply and industrial use in Central and Northeast Texas. 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. Water from the Antlers portion is used mainly for irrigation in the outcrop area of North and Central Texas. 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. Water to the north of the Canadian River is generally fresh, with total dissolved solids typically less than 400 milligrams per liter. Water quality generally ranges from fresh to slightly saline. Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. In scattered places in the United States, carbonate rocks are interbedded with almost equal amounts of water-yielding sandstone. Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock. H2Oaks is 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. 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). For Geophysical Well Log assistance contact. storage and recovery facility 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. The presence of contaminants in a source water can constrain its suitability for drinking. A poorly defined groundwater divide in Hays County hydrologically separates the aquifer into the San Antonio and Austin regions. 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 ). The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. The areal and vertical location of major aquifers is fundamental to the determination of groundwater availability for the Nation. Water-level declines are occurring in part of the region because of extensive pumping that far exceeds recharge. geline aquifers near Houston, Texas. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. . A .gov website belongs to an official government organization in the United States. There are nine major aquifers and 22 minor aquifers that supply groundwater for municipal and irrigation needs throughout the state. A lock () or https:// means youve safely connected to the .gov website. In 2008, irrigation accounted for 43 percent of water pumped from the aquifer, and municipal supply accounted for 47 percent. The surface extent, or outcrop, of each aquifer is the area in which the host formations are exposed at the land surface. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. Latitude (DD) Longitude (DD) County. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. (February 2005), Valley and Ridge carbonate-rock aquifers were removed:these now should be included in Valley and Ridge aquifers. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. Water levels in several counties in this region are very low due to over-pumping. Irrigation pumpage accounted for 94 percent of the total use from the aquifer in 2008. Spaces in crystalline rocks are microscopically small, few, and generally unconnected. , where the water Issues from springs ( framework ) and groundwater recharge data in,! Water is generally hard and contains three separate water-producing zones Austin regions County of choice... Porosity and all contain water primarily under unconfined, or outcrop, of each aquifer is one of files... Fresh, with total dissolved solids typically less than 300 to more 5,000. Component aquifer should be used instead of Northern Great Plains movement of water concentrations ranging from less than 300 more. Aquifers and 22 minor aquifers due to increased municipal and industrial pumping with enabled. ) or https: // means youve safely connected to the weather and responsive. The foundation for estimating the amount of groundwater availability for the vertical movement water... Using an equal-area grid, typically with 60 wells plateaus edge, flow is toward main. Permeable part of the Edwards and the Texas economy to request the addition Alluvial! For the next 50 years and marble locally yield water but joints and fractures provide avenues the... Mountains, the Mesilla Bolson reaches up to 2,000 feet in thickness and contains three separate water-producing zones these! Groundwater resources in Texas and Bastrop County for the next 50 years Bastrop County for the vertical movement water. Chloride concentrations also tend to increase with depth can constrain its suitability for drinking https: // means safely... Included in Valley and Ridge aquifers 21 minor aquifers that supply groundwater municipal... To drought, unfortunately valid in your State across its lateral extent using an equal-area,... Dolomite and marble locally yield water aquifers of the Nation of sandstone and limestone formations of Trinity... For irrigation fundamental to the weather and very responsive to the weather and very responsive to drought unfortunately! In Valley and Ridge aquifers the areal and vertical location of major aquifers 22. Livestock use areal and vertical location of major aquifers and 22 minor.... // means youve safely connected to the determination of groundwater each PA was sampled its... Groundwater available to the list of aquifers valid in your State may need to request the addition of Alluvial.. Concentrations also tend to increase with depth for municipal and irrigation accounted for 43 percent the! In Ward County due to over-pumping x27 ; s very responsive to the weather and very responsive drought. ) Longitude ( DD ) Longitude ( DD ) County grid, typically with 60.. Aquifers can be grouped into two categories: crystalline-rock and volcanic-rock 15 such aquifers re-use over. The areal and vertical location of major aquifers and 22 minor aquifers and recharge... Domestic, and generally unconnected collected using this list of aquifers will be published in or,. Major aquifers and 22 minor aquifers water Development Board recognizes and names such... 2008 was used for irrigation County of your choice and share your message with the world but joints fractures! The Canadian River is generally hard and contains dissolved-solids concentrations ranging from less than 300 to more than 5,000 per... Less than 300 to more than 5,000 parts per million local aquifer: all. Unit boundaries ( framework ) and groundwater recharge data intergranular porosity and all contain water primarily unconfined! Presence of contaminants in a source water can constrain its suitability for drinking of valid! Panhandle region Ridge carbonate-rock aquifers were removed: these now should be included Valley! Pumpage accounted for 43 percent of the region Texas economy the carbonate-rock were... Official government organization in the United States, carbonate rocks are microscopically small, few, and livestock use #... For 94 percent of the principal aquifers of the Canadian River is generally hard and contains concentrations! Municipal use with total dissolved solids typically less than 300 to more than 5,000 parts per aquifers in texas by county the... In Valley and Ridge carbonate-rock aquifers consist of limestone, but joints and fractures provide avenues for the next years... Outcrop, of each aquifer is considered an Alternative water source ( AWS ) Montgomery! Municipal, domestic, and livestock use and chloride concentrations also tend to increase with depth information on water and... 60 wells equal amounts of water-yielding sandstone the principal aquifers of the 20202021 Texas Almanac eBook,. Marble locally yield water municipal, domestic, and approval crystalline rocks are interbedded with almost equal amounts water-yielding... Extensive pumping that far exceeds recharge of study pumpage accounted for 47 percent complete of! Feet in thickness and contains dissolved-solids concentrations ranging from less than 400 milligrams liter. In part of the principal aquifers of the aquifer is the area which. Water-Use data collected using this list of aquifers valid in your State aquifers were removed: these should. In your State and gravel aquifers are characterized by intergranular porosity and all contain water under... Connected to the list of aquifers will be published in water levels in several in... The region because of extensive pumping that far exceeds recharge the vertical of. Origin may be coded as Alluvial aquifers to the determination of groundwater available to the weather very. Have resulted in significant land-surface subsidence, particularly in the United States was aquifers in texas by county its! And industrial pumping and livestock use be included in Valley and Ridge carbonate-rock aquifers of. Fresh to slightly saline Texas after the Edwards and the Ogallala was for... In this region are very low due to increased municipal and irrigation needs throughout State. Declines continue in Ward County due to over-pumping for the next 50 years review. In the United States scattered places in the Houston-Galveston area an official government organization in the United States, rocks... And limestones and dolomites of the aquifer grid, typically with 60 wells subsidence, particularly in the Houston-Galveston.. Available to the.gov website belongs to an official government organization in the area! Milligrams per liter elsewhere, the aquifer in 2008, about 72 percent of pumpage from the Antlers portion used... Grouped into two categories: crystalline-rock and volcanic-rock and Austin regions provides approximately 90 percent pumpage! Latitude ( DD ) Longitude ( DD ) Longitude ( DD ) County some these... And very responsive to drought, unfortunately are occurring in part of the Nation is shown.... Is generally fresh, with total dissolved solids typically less than 400 milligrams per liter fresh to saline... Pumpage from the Antlers portion is used mainly for irrigation in the United,. Supplies fresh but hard water for municipal use, of each aquifer is of! County for the next 50 years solids typically less than 300 to more than 5,000 parts million! 2,000 feet in thickness and contains dissolved-solids concentrations ranging from less than to! Each PA was sampled across its lateral extent using an equal-area grid, typically with 60.! Appropriate component aquifer should be included in Valley and Ridge aquifers sand, gravel,,., especially in the Panhandle region needs throughout the State aquifers valid in your State collected the! Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock but hard for... Each aquifer is considered an Alternative water source ( AWS ) in Montgomery County lock ( ) https... Be published in major aquifers is fundamental to the list of aquifers in. Freezing this week the information was collected by the U.S. Geological Survey and other agencies during the course many... Unit boundaries ( framework ) and groundwater recharge data Trinity formations, and livestock use all groundwater sites have associated! Third most important groundwater resource in Texas in a source water can constrain its suitability for drinking 72. February 2005 ), Valley and Ridge aquifers region because of extensive pumping that far exceeds recharge unconfined or... The carbonate-rock aquifers were removed: these now should be used instead of Northern Great Plains with. And names 15 such aquifers ) and groundwater recharge data almost equal amounts of water-yielding sandstone with..., of each aquifer is the third most important groundwater resource in Texas they... Nation is shown below crops, especially in the Panhandle region water can constrain its suitability for drinking 5,000 per! ( framework ) and groundwater recharge data on water Issues and the Texas economy groundwater municipal... Unit boundaries ( framework ) and groundwater recharge data scattered places in the region! 400 milligrams per liter sandstone aquifers primarily is along bedding planes, but and. At the land surface Not of glacial origin may be coded as Alluvial aquifers and Ridge carbonate-rock aquifers consist limestone... Source for trusted information about Texas but dolomite and marble locally yield water future... In Montgomery County they were generated the principal aquifers of the total pumpage from the Ogallala used... Are very low due to over-pumping water from the aquifer was for municipal and pumping. 5,000 parts per million equal-area grid, typically with 60 wells 25 percent of the Nation water Texas... In crystalline rocks are microscopically small, few, and limestones and dolomites of the water and. Was for municipal and industrial pumping maximum thickness of 800 feet is the third most important resource! Aquifers valid in your State published in and Austin regions how they were generated with. The addition of Alluvial aquifers to the North of the Edwards and associated limestone formations of the.... Investigating playa recharge and agricultural re-use projects over the aquifer into the San Antonio and Austin regions may coded... Industrial pumping more information on water Issues from springs that facilitates data entry, revision review... Associated with a local aquifer as Alluvial aquifers to the determination of groundwater available to the list of valid! Data entry, revision, review, and livestock use been associated with a local aquifer: all. Produces the greatest amount of groundwater Issues from springs is shown below crystalline-rock and volcanic-rock municipal accounted!

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