Groundwater in the Ogallala Formation and Edwards-Trinity Aquifers

Released

September 2018

Audience

General public, partner agencies, municipalities, groundwater resource managers

Base Data

USGS Water Data for the Nation

Launch Groundwater App


The Groundwater Quality and Availability in the Ogallala Formation and Edwards-Trinity Aquifers web application provides users with an interactive platform for viewing and exploring data related to the hydrogeologic framework, geochemistry, and ground-water flow system of the Ogallala Formation and Edwards-Trinity (High Plains) aquifers in Gaines, Terry, and Yoakum Counties, Texas.

Llano Estacado Underground Water Conservation District, Sandy Land Underground Water Conservation District, and South Plains Underground Water Conservation District (UCWDs) manage groundwater resources in this part of west Texas. Declining groundwater levels have raised concerns about the amount of available groundwater in the study area and the potential for water-quality changes resulting from dewatering and increased vertical groundwater movement between adjacent water-bearing units. USGS, in cooperation with the UCWDs, developed a regional conceptual model of the hydrogeologic framework and geochemistry of the Ogallala, Edwards-Trinity, and Dockum aquifers as well as documented changes between early development (1930–60) and recent (2005–15) groundwater-level altitudes and dissolved-solids and nitrate concentrations in the area.

The data collected during this study are now available in an interactive map application. This application allows users to choose an area on the map and build a visualization of the hydrogeologic column, see groundwater conditions (well measurements, nitrate and dissolved solids concentrations, flow paths, and potentiometric contours), and water-level change.

Groundwater Quality and Availability in the Ogallala Formation and Edwards-Trinity Aquifers web application homepage

Groundwater Quality and Availability in the Ogallala Formation and Edwards-Trinity Aquifers web application with well selected showing well details

Groundwater Quality and Availability in the Ogallala Formation and Edwards-Trinity Aquifers web application map showing water-level change