Texas Department of Licensing and Regulation's (TDLR) Submitted Driller's Report Database. This database contains water well reports submitted to TDLR from February 2001 to present.

The Texas Water Development Board (TWDB) Groundwater Database (GWDB) contains information on selected water wells, springs, oil/gas tests (that were originally intended to be or were converted to water wells), water levels, and water quality to gain representative information about aquifers in Texas to support water planning from a local to a more regional perspective. This is a scientific database, not a registry of every well drilled in the state.

The Submitted Drillers Report (SDR) Database is populated from the online Texas Well Report Submission and Retrieval System (TWRSRS) which registered water-well drillers use to submit their required reports. This dataset contains pipe "|" delimited text files of all data tables from the Submitted Drillers Report (SDR) database, updated nightly.

This dataset documents depth to groundwater measurements made from wells screened in the Chicot aquifer, Evangeline aquifer, Jasper aquifer, Burkeville confining unit, Catahoula confining unit, or a combination of these hydrogeologic units in the greater Houston area, Texas for 2024. The U.S. Geological Survey (USGS) 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 Groundwater Conservation District. This dataset was created to provide resource managers, public officials, researchers, and the public with ready access to information regarding depths to groundwater in the region. The data in this dataset were collected from December 2023 through March 2024 and, with the exception water-level data provided by private corporations and the calculated median values provided only herein, are stored in the USGS National Water Information System (NWIS), a publicly available, searchable, online database of water information (USGS, 2024).

An extensive archive containing more than 10,000 historical (1918–2020) geophysical logs collected in conjunction with studies done by various entities and more than 2,000 additional donated well and geophysical logs are stored in hard-copy at the Central Texas Branch of the Oklahoma-Texas Water Science Center (OTWSC) in Austin, Texas. This dataset addresses the need to preserve these records electronically by providing a scanned and indexed collection of 11,171 of these records. Data are provided as a comma-separated value (CSV) text file and a Microsoft Access database in ACCDB format containing detailed well header information for each record. Also included are zipped files containing the geophysical log scans in Portable Document Format (PDF).The original dataset was published in January 2024, and revised in September 2024. This revision incorporates 5,113 additional log scans and header information into the original dataset containing 6,058 logs scans and header information. ...

Groundwater-quality data and geophysical information for relatively deep wells (wells generally more than 300 feet deep) containing saline water (dissolved-solids concentrations greater than 2,000 milligrams per liter) are limited throughout the state of Texas. Information derived from geophysical well logs can be used to estimate groundwater salinity. Geophysical logs were collected in 2021 from 10 of the 12 wells completed in selected aquifers (Trinity, Edwards-Trinity (Plateau), Carrizo-Wilcox, Sparta, and Yegua-Jackson) in Texas.

The Brackish Resources Aquifer Characterization System (BRACS) Database stores well and geology information to help characterize the brackish groundwater resources of Texas. This database contains all types of wells (not just brackish water wells) including those in fresh water zones with linked geophysical well logs, aquifer test information, lithology and stratigraphic picks. Website Link: https://www.twdb.texas.gov/innovativewater/bracs/projects/HB30_Gulf_Coast/index.asp

• Global Groundwater Levels - Annual groundwater level data described in the following publication: Jasechko, S. Seybold, H.S., Perrone, D., Fan, Y., Shamsudduha, M., Taylor, R.G., Fallatah, O., Kirchner, J.W. Rapid groundwater decline and some cases of recovery in aquifers globally. Nature, doi.org/10.1038/s41586-023-06879-8 (2024). Annual groundwater level data are available in cases where we have received permission from a database manager to post annual groundwater level data. These two .csv files contain annual groundwater level data for Afghanistan, Austria, Belgium, Brazil, Bulgaria, Canada (Alberta, British Columbia, Manitoba, Northwest Territories, Ontario, Prince Edward Island, Saskatchewan, Yukon), China, Croatia, Czech Republic, Denmark, France, Germany, Guam, Ireland, Israel, Italy, Latvia, Lithuania, New Zealand, Norway, Paraguay, Poland, Slovenia, Sweden, Switzerland, and the United States (Groundwater Ambient Monitoring and Assessment Program, US Geological Survey's (USGS) National Water Information System, and the Texas Water Development Board).

File 1 of 2 entitled "AnnualDepthToGroundwater.csv" "StnID" - unique number for the monitoring well "Lat" - latitude of the monitoring well (in some cases this may be an approximation) "Lon" - latitude of the monitoring well (in some cases this may be an approximation) "IntegerYear" - calendar year "DepthToWater_m" - annual median depth to groundwater (units of metres below reference point and/or groundwater surface)

File 2 of 2 entitled "AnnualGroundwaterElevation.csv" "StnID" - unique number for the monitoring well "Lat" - latitude of the monitoring well (in some cases this may be an approximation) "Lon" - latitude of the monitoring well (in some cases this may be an approximation) "IntegerYear" - calendar year "GroundwaterElevation_masl" - annual median groundwater elevation (units of metres above sea level)

This material is based on work supported by the National Science Foundation under grant nos. EAR-2048227 and EAR-2234213. This research was supported by funding from the Zegar Family Foundation. This material is based on work supported by the U.S. Geological Survey (USGS) through the California Institute for Water Resources (CIWR) under grant/cooperative agreement no. G21AP10611-00. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the USGS/CIWR. Mention of trade names or commercial products does not constitute their endorsement by the USGS/CIWR. R.G.T. acknowledges the support of a fellowship (ref. 7040464) from the Canadian Institute for Advanced Research under the Earth 4D programme. S.J. acknowledges the Jack and Laura Dangermond Preserve (https://doi.org/10.25497/D7159W ), the Point Conception Institute and the Nature Conservancy for their support of this research.

For a related database of global aquifer system boundaries see: https://www.hydroshare.org/resource/73834f47b8b5459a8db4c999e6e3fef6/

Texas Department of Licensing and Regulation's (TDLR) Submitted Driller's Report Database. This database contains plugged water well reports submitted to TDLR from February 2001 to present.Website Link: http://www.twdb.texas.gov/groundwater/data/drillersdb.asp

Water-resources data for the 2004 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 2 contains records for water discharge at 54 gaging stations; stage only at 4 gaging stations; elevation at 17 lakes and reservoirs; content at 8 lakes and reservoirs; and water quality at 22 gaging stations. Also included are data for 2 partial-record stations comprised of 1 flood-hydrograph and 1 crest-stage station. Also included are lists of discontinued surface-water discharge or stage-only stations and discontinued surface-water-quality stations. Additional water data were collected at various sites, not part of the systematic data-collection program, and are published as miscellaneous measurements. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating Federal, State, and local agencies in Texas. Records for a few pertinent stations in the bordering States also are included.

This data release contains compiled historical groundwater-withdrawal data for the Coastal Lowlands aquifer system in Texas, Louisiana, Mississippi, Alabama, and Florida from 1925 to 2018. Most groundwater-withdrawals were distributed to groundwater wells and separated into water-use categories of industrial, production well, power generation, mining, domestic, irrigation, livestock or commercial. Groundwater-withdrawal data were obtained, where available, from existing database resources hosted by various State and Federal agencies. For Texas, data were obtained from the Texas Water Development Board (TWDB) from both existing Groundwater-Availability Models (GAM), and from historical groundwater-withdrawal data. For Louisiana data were obtained from the U.S. Geological Survey Lower Mississippi-Gulf Water Science Center, Baton Rouge, Louisiana office. For Mississippi data were obtained from the Mississippi Department of Environmental Quality, and from the U.S. Geological Survey Lower Mississippi-Gulf Water Science Center, Jackson, Mississippi. For Alabama data were obtained from the Alabama Department of Economic and Community Affairs, Office of Water Resources, and from the U.S. Geological Survey Lower Mississippi-Gulf Water Science Center, Montgomery, Alabama office. For Florida data were obtained from the U.S. Geological Survey Caribbean-Florida Water Science Center, Lutz and Orlando Florida offices.

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

The U.S. Geological Survey in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District has produced this dataset of water‐level altitudes and water‐level changes in the Chicot, Evangeline, and Jasper aquifers in the Houston‐Galveston region, Texas.This dataset shows current‐year (2015-2016) water‐level altitudes for each aquifer, 5‐year (2011‐16) water‐level changes for each aquifer, long‐term (1990‐2016 and 1977‐2016) water‐level changes for the Chicot and Evangeline aquifers, and long‐term (2000‐2016) water‐level change for the Jasper aquifer. For the 1‐year (2015-16) water‐level changes, data were computed as the difference in water‐level altitude at each point (well) for which a water‐level measurement was made in 2015 and 2016. Five‐year (2011‐16) water‐level changes were computed the same as for the 1‐year water-level changes; the difference in water‐level altitude at each point for which a water‐level measurement was made in 2011 and 2016. The water‐level measurements in the dataset are built upon and stored in the National Water Information System: Web Interface, groundwater information, field measurements website located here: http://dx.doi.org/10.5066/F7P55KJN This site is a publicly available, searchable, online database of water information.

This dataset documents for 2018 the depth to groundwater measured in wells screened in the Chicot, Evangeline, and Jasper aquifers in the Houston‐Galveston region, Texas. The U.S. Geological Survey prepared this dataset in cooperation with the Harris‐Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District. This dataset was created to provide resource managers, public officials, researchers, and the general public with ready access to accurate, impartial, scientific information regarding the depth to groundwater in the region. All of the data in this dataset were collected from December 2017 through March 2018 and are stored in the National Water Information System (NWIS), a publicly available, searchable, online database of water information (http://dx.doi.org/10.5066/F7P55KJN).

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. 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 Groundwater Conservation District. This dataset was created to provide resource managers, public officials, researchers, and the general public with ready access to information regarding depths to groundwater in the region. All of the data in this dataset were collected from December 2018 through March 2019 and are stored in the National Water Information System (NWIS), a publicly available, searchable, online database of water information (http://dx.doi.org/10.5066/F7P55KJN).

The Digital Geologic-GIS Map of San Antonio Missions National Historical Park and Vicinity, Texas is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) a 10.1 file geodatabase (saan_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro map file (.mapx) file (saan_geology.mapx) and individual Pro layer (.lyrx) files (for each GIS data layer), as well as with a 2.) 10.1 ArcMap (.mxd) map document (saan_geology.mxd) and individual 10.1 layer (.lyr) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI 10.1 shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) A GIS readme file (saan_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (saan_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (saan_geology_metadata_faq.pdf). Please read the saan_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri,htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: Texas Bureau of Economic Geology, University of Texas at Austin and Texas Water Development Board. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (saan_geology_metadata.txt or saan_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:250,000 and United States National Map Accuracy Standards features are within (horizontally) 127 meters or 416.7 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

In situ recovery (ISR) uranium mining is a technique in which uranium is extracted by a series of injection and recovery wells developed in a permeable sandstone host rock. Chemical constituents (lixiviants) are added to groundwater injection wells to mobilize uranium into groundwater. Before mining, baseline water quality is measured by sampling groundwater from the aquifer intended to be mined and over and underlying units over a geographic area that reflects the proposed mine location. After mining, groundwater is restored using a variety of techniques intended to return groundwater quality to as close to baseline as practicable. After groundwater has been restored, groundwater quality is monitored to determine if the groundwater chemistry has stabilized. The impact of ISR mining on groundwater is poorly understood because records archiving these impacts are difficult to locate. The USGS collected as many historic records describing ISR well fields as they could locate between ...

The Edwards and Trinity aquifers are major sources of water in south-central Texas and are both classified as major aquifers by the State of Texas. The population in Hays and Comal Counties is rapidly growing, increasing demands on the area's water resources. To help effectively manage the water resources in the area, refined maps and descriptions of the geologic structures and hydrostratigraphic units (HSUs) of the aquifers are needed. This digital map database presents the detailed 1:24,000-scale bedrock hydrostratigraphic map as well as names and descriptions of the geologic and hydrostratigraphic units of the Driftwood and Wimberley 7.5-minute quadrangles in Hays and Comal Counties, Tex.

Declining groundwater levels in and near Gaines, Yoakum, and Terry Counties in the Texas Panhandle have raised concerns about the amount of available groundwater and the potential for water-quality changes resulting from dewatering and increased vertical groundwater movement between adjacent water-bearing hydrogeologic units. More than 9,800 well records, such as geophysical logs, drilling descriptions, and published hydrogeologic framework information, were evaluated to help characterize the framework of hydrogeologic units in the study area. Additional geophysical data were collected to improve the spatial coverage across the study area and to reduce uncertainty with regard to hydrogeologic unit extents. Of greatest interest was gaining a refined understanding of how the saturated thickness of the Ogallala and Edwards-Trinity aquifers vary throughout the study area.

This data release contains geophysical data and well and borehole driller's logs acquired at a small field site in the Llano Uplift of central Texas. The field site is underlain by the unconfined Precambrian Granite Gravel aquifer and the Precambrian Town Mountain Granite bedrock from which the Granite Gravel Aquifer was derived through chemical and mechanical weathering. The data set consists of five types of data in the quantities indicated: (1) 1 time-domain electromagnetic sounding, (2) 441 self-potential measurements, (3) 2 electrical resistivity tomography profiles, (4) 2 seismic refraction tomography profiles, and (5) 4 driller's logs (obtained from 2 wells and 2 shallow boreholes). The data were collected primarily from within a 100-meter (m) by 100-m survey area to characterize the geoelectric and seismic properties of the Granite Gravel Aquifer. Emphasis was placed upon evaluating the successes of time-domain electromagnetic sounding and seismic refraction tomography to map the water-table and bedrock depths, respectively, in the shallow subsurface. This emphasis provided the catalyst for a more extensive geophysical characterization of the aquifer to provide enough contrasting data to reduce uncertainty in the interpretations made from the electromagnetic and seismic data. Geophysical properties of the aquifer were measured and correlated to driller's logs from local wells and boreholes to interpret the water-table and bedrock depths beneath the survey area. Correlations between geophysical data and driller's logs enabled a hydrogeophysical characterization of the Granite Gravel Aquifer and Town Mountain Granite beneath the survey area at the field site.