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.

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.

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. The original logs scans and header information were not changed except for minor edits as a result of additional quality assurance reviews .

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.Website Link: http://www.twdb.texas.gov/groundwater/data/drillersdb.asp

Texas Water Development Board’s (TWDB) Groundwater Database. This database contains information on selected water wells, springs, oil/gas tests, water levels and water quality. Brackish Groundwater.Website Link: https://www.twdb.texas.gov/groundwater/

This dataset contains monthly pumping rates for municipal and industrial (MnI) wells in Texas within the Rio Grande Transboundary Integrated Hydrologic Model (RGTIHM) that were not included in other pumping rate datasets. In RGTIHM, these wells are considered the Texas Water Development Board (TXWDB) group. Monthly pumping rates are presented in units of cubic feet per day for the period from March 1940 through December 2014.

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).

The Water Well Report Viewer allows users to locate and review copies of over 800,000 historical reports for water wells drilled in Texas. It allows the viewer to navigate to counties and grids, and to select the type of reports to view along with the scope (reports by county or by grid number). Contact Email: gpat@tceq.texas.gov

The availability of groundwater-quality data along with 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)) is limited throughout the state of Texas. Water-quality samples are important for calibrating estimates of groundwater salinity derived from geophysical well logs. Water-quality samples and geophysical logs were collected from a total of 12 wells completed in selected aquifers (Trinity, Edwards-Trinity (Plateau), Carrizo-Wilcox, Sparta, and Yegua-Jackson) in Texas.

The High Plains aquifer extends from approximately 32 to 44 degrees north latitude and from 96 degrees 30 minutes to 106 degrees west longitude. The aquifer underlies about 175,000 square miles in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. This digital data set contains water-level measurements from wells screened in the High Plains aquifer and measured in both predevelopment (about 1950) and for 2017. There were 2,928 wells measured in both predevelopment (about 1950) and 2017 as well as 63 wells located in New Mexico, which were measured in predevelopment and at least once between 2013 and 2016. These water-level measurements were used to map water-level changes, predevelopment (about 1950) to 2017. The map was reviewed for consistency with the relevant data at a scale of 1:1,000,000.

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

These layers contain Public Water Supply sites in the State of Texas. The locations were obtained by the Water Supply Division as recorded from various sources and built using the best existing location data available from these sources. Although some location errors were found and corrected in the process, some errors still remain. As resources allow, TCEQ intends to improve the accuracy of these locations to meet the standards set forth in the agency's Positional Data Policy.This layer was developed to support the TCEQ's Source Water Assessment and Protection Program (SWAP).

In cooperation with the San Antonio Water System, continuous and discrete water-quality data were collected from groundwater wells completed in the Edwards aquifer, Texas, 2014-2015. Discrete measurements of nitrate were made by using a nitrate sensor. Precipitation data from two sites in the National Oceanic and Atmospheric Administration Global Historical Climatology Network are included in the dataset. The continuous monitoring data were collected using water quality sensors and include hourly measurements of nitrate, specific conductance, and water level in two wells. Discrete measurements of nitrate, specific conductance, and vertical flow rate were collected from one well site at different depths throughout the well bore.

The Ogallala aquifer is contained in the Tertiary-age Ogallala Formation in the Texas Panhandle and is the primary water-bearing hydrogeologic unit of the High Plains aquifer system. The Ogallala aquifer is the primary source of water used for agricultural and municipal purposes in the Texas Panhandle. The Dockum aquifer is contained in the formations that compose the Triassic-age Dockum Group and serves as an additional source of water in the Texas Panhandle. Depth to groundwater measurements and water-quality samples were collected from 32 monitoring wells in the North Plains Groundwater Conservation District management area within the northern part of the Texas Panhandle as part of two synoptic sampling efforts, one during 2012–13 and the other during 2019–20. Groundwater-quality samples were collected for analysis of dissolved solids, major ions, nutrients, and trace elements. Selected organic compounds were analyzed in samples collected from a subset of 6 wells. Sample results for selected constituents were compared to drinking-water standards and between the two synoptic sampling times in an interpretative report. A previously published report by Baldys and others (2014) discusses the results from the 2012–13 sampling event.

• 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/

This is a data release comprised of data compiled during the construction of monitoring wells at four sentinel well sites: Trumbull, Cesar Chavez, Southern, and VA. These wells are located in southeastern Albuquerque, New Mexico (Figures 1 and 2). Between March 2013 and April 2016, the United States Geological Survey (USGS), in cooperation with the Albuquerque Bernalillo County Water Utility Authority and the U.S. Air Force Civil Engineer Center, installed 22 wells at four sites on and near Kirtland Air Force Base (KAFB). The wells, installed in response to an aviation fuel spill that was discovered in 1999 at the Bulk Fuels Facility (BFF) on KAFB, were screened at varying depths in order to characterize the aquifer at shallow, intermediate, and deep depths. Groundwater contaminant plumes at the water table, comprised of various constituents of aviation fuels, including ethylene dibromide (EDB), have been determined to extend north-northeast from the BFF (U.S. Army Corps of Engineers, 2017). The primary function of the USGS sentinel wells is to allow early detection of the EDB plume, in protection of nearby community water-supply wells. The well locations were selected to provide 5-10 years of advanced warning of plume migration towards supply wells. Decisions regarding well locations were aided by groundwater modeling (Ellinger, 2013; Air Force Civil Engineering Center, 2013). Personnel from the USGS Western Region Research Drilling Project, under the direction of a USGS Mew Mexico Water Science Center hydrologist, drilled boreholes, then constructed and developed wells. The boreholes were primarily drilled using direct mud-rotary drilling methods with a tricone rotary bit (S. Crawford, USGS, written communication, 2018), except for the shallow boreholes at Cesar Chavez and Southern sites, which used a percussive air-hammer method (S. Crawford, USGS, written communication, 2018) due to lithological conditions. The percussive air-hammer system used advances casing during the drilling process. Both mud rotary and the percussive air-hammer are good drilling methods in unconsolidated formations where borehole collapse is likely (Hammermeister and others, 1986). Drill cuttings were collected at 10-foot intervals from the boreholes at all sites. A USGS hydrologist described the cuttings from each borehole. The cuttings are archived at the New Mexico Bureau of Geology and Mineral Resources, in Socorro, New Mexico. Staff from the USGS Texas Water Science Center performed geophysical logging in the boreholes prior to well construction using a Century Geophysical system 6 and a Mount Sopris Matrix system (J. Thomas, USGS, written communication, 2018). The suite of geophysical logs included caliper, gamma, neutron, long- and short-spaced density, density porosity, neutron porosity, resistivity (including long-normal, short-normal, single-point resistivity, and lateral resistivity), spontaneous-potential, and electrical-conductivity logs. See attached selected geophysical logs for details. In February, 2016, the Cesar Chavez and Southern pumping wells were grouted to a shallower depth to aid in aquifer characterization activities. Cesar Chavez was grouted to 826 feet (ft) below land surface (bls), but the grout has since been located at 952 ft bls, most likely a result of settling. The Southern pumping well was grouted up to 877 ft bls. The Trumbull site has 3 wells in a single borehole (Figure 3). The Cesar Chavez and Southern sites each have 8 wells in 4 boreholes (Figures 4 and 5). The sentinel wells, designated A, B, C, and D are located in 2 boreholes, with the A well located in a borehole by itself; the pumping well, designated E, is located in a single borehole, and the observation wells, designated F, G, and H, are located in a single borehole. The purpose of the observation and pumping wells at the Cesar Chavez and Southern sites was for a planned aquifer test. The VA site has 3 wells in a single borehole (Figure 6). For detailed construction and development information, see the attached construction diagrams and table of well construction data. For detailed construction and development information, see the attached figures and table. References: Air Force Civil Engineer Center, 2013, Contingency plan for groundwater production wells near the bulk fuels facility spill area, prepared by CH2MHILL, Albuquerque, New Mexico, variously paged. Accessed August 17, 2018, at www.radfreenm.org/images/PDF/KAFB/3-d/hill_draft_contingency.pdf. Ellinger, Scott, 2013, Simulated mass transport of 1,2-dibromoethane in groundwater of southeast Albuquerque, New Mexico: U.S. Environmental Protection Agency, Region 6, 79 p. Accessed August 17, 2018, at www.radfreenm.org/images/PDF/KAFB/3-d/EPA6-Ellinger-report.pdf. Hammermeister, D.P., Blout, D.O., and McDaniel, J.C., 1986, Drilling and coring methods that minimize the disturbance of cuttings, core, and rock formations in the unsaturated zone, Yucca Mountain, Nevada, in Proceedings of the NWWA Conference on Characterization and Monitoring of the Vadose (Unsaturated) Zone: National Water Well Association, Worthington, Ohio, p. 507-541. Accessed August 17, 2018, at https://www.osti.gov/biblio/59845-QUVhus/. U.S. Army Corps of Engineers, 2017, RCRA facility investigation report bulk fuels facility release solid waste management unit ST-106/SS-111 Kirtland Air Force Base, New Mexico: prepared by Sundance Consulting, Inc., Albuquerque, New Mexico, variously paged. Accessed August 17, 2018, at https://www.kirtlandjetfuelremediation.com/projdocs/Kirtland_AFB_BFF_Risk_Assessment_fnl.pdf.

Texas water wells within the Rio Grande River Basin. These layers contain Public Water Supply sites in the State of Texas. The locations were obtained by theWater Supply Division as recorded from various sources and built using the best existing location dataavailable from these sources. Although some location errors were found and corrected in the process,some errors still remain. As resources allow, TCEQ intends to improve the accuracy of these locations tomeet the standards set forth in the agency's Positional Data Policy. This layer was developed to supportthe TCEQ's Source Water Assessment and Protection Program (SWAP).

The Transboundary Aquifer Assessment Act was established to systematically assess priority aquifers along the U.S.-Mexico international boundary. The priority aquifers that were specified include the Hueco-Mesilla Bolsons aquifer in Texas and New Mexico and its counterpart in Mexico, the Conejos-Medanos Aquifer system, and the Santa Cruz and San Pedro aquifers in Arizona (Texas Water Development Board, 2019). The Transboundary Aquifer Assessment Program (TAAP) was started in 2009 and is a collaborative effort between the U.S. Geological Survey, Arizona Water Resources Research Center, New Mexico Water Resources Research Institute, and the Texas Water Resources Institute (U.S. Geological Survey, 2018) to better understand these aquifers. More information about TAAP can be found at the TAAP project website: https://webapps.usgs.gov/taap/. This data release contains data from water-quality analyses of groundwater samples collected from production wells within the Hueco Bolson which is part of the Hueco-Mesilla Bolsons aquifer system. Sampling locations were determined in coordination with El Paso Water and the U.S. Army Air Defense Artillery Center to meet TAAP goals of understanding groundwater-quality data and providing useful information to decision makers. Groundwater samples were collected from 20 production wells operated by El Paso Water and Fort Bliss Water Services during August 29–September 23, 2016. These samples were analyzed for major ions, trace elements, nutrients, pesticides, carbon isotopes, strontium isotopes, hydrogen isotopes, and oxygen isotopes. Three additional Fort Bliss Water Services wells were sampled between May 31 and June 1, 2017. These samples were analyzed for major ions, trace elements, dissolved gasses, carbon isotopes, strontium isotopes, hydrogen isotopes, oxygen isotopes, boron isotopes, and uranium isotopes.

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Groundwater samples were collected from domestic and public-supply wells in the Eagle Ford study area in 2015–16, in the Fayetteville study area in 2015, and in the Haynesville study area in 2014–15. One sample of produced water was collected from a gas well in the Haynesville Shale in Rusk County, Texas in 2010, and 5 samples of produced water were collected from oil and condensate wells in the Eagle Ford Shale in Gonzales and Lavaca Counties, Texas in 2015. Groundwater samples were analyzed for major ions, nutrients, and trace elements; methane, methane H and C isotopic compositions, and C1-C5 gas composition; H and O isotopic composition of water; noble gas concentrations and isotopic compositions; tritium, sulfur hexafluoride (SF6), and carbon-14 in dissolved inorganic carbon (DIC), and δ13C-DIC; and volatile organic compounds (VOCs). Water from hydrocarbon wells was analyzed for a subset of these constituents.