Collection Method

Collection Method Description

Well location information for all newly added wells is collected by TWDB field staff and cooperators such as Groundwater Conservation Districts, universities, and other state and federal agencies, using GPS. Historical well location information may have been collected using a variety of methods including locating from a topo map. The Coord Source field provides additional information on the accuracy of well location information and how it was collected. Hydrogeological data such as water levels and water quality analyses were similarly collected using a variety of methods. Most were obtained directly from field measurements, but some historical data was transcribed from administrative reports. The Measurement Method and Measuring Agency fields for Water Levels and the Collection Entity and Reliability fields for Water Quality provide additional information on how that information was collected for individual sites.

Quality Control Level

Quality Assurance Description

The data entry application for the Groundwater Database has some built-in rules to help prevent data entry errors, but the majority of the quality control is performed through comprehensive review by TWDB staff using visual inspection of the data, SQL queries to perform logic tests on the data, and hydrographs to compare water level trends.

Spatial Coverage

Bounding Coordinates

• North: 36.53226
• East: -93.36182
• South: 25.76589
• West: -106.85303

Coordinate System

Spatial Description

Statewide in Texas

Disclaimer

Except where noted, all of the information provided in the GWDB is believed to be accurate and reliable; however, the TWDB assumes no responsibility for any errors appearing in rules or otherwise. Further, TWDB assumes no responsibility for the use of the information provided. PLEASE NOTE that users of these data are responsible for checking the accuracy, completeness, currency and/or suitability of all information themselves. TWDB makes no guarantees or warranties as to the accuracy, completeness, currency, or suitability of the information provided via the GWDB. TWDB specifically disclaims any and all liability for any claims or damages that may result from providing GWDB data or the information it contains.

Program Area

Supporting URLs

Data Contact Email