Region J: Plateau
Texas is divided into 16 water planning regions. The 16 regions were created by looking at shared water sources, community boundaries, public input, and other factors. Here we highlight Region J located on the southern edge of the Edwards Plateau. Stretching from the Hill Country to the Rio Grande, this region relies on groundwater and spring flows to support its many small communities as well as its ranching and tourism.
Primary Water Sources: Multiple Aquifers
An aquifer is like a sponge underground that holds water from rain and rivers after it soaks into the ground. This region features three major aquifers with similar names—Edwards-Trinity, Trinity, and Edwards aquifers. More than two-thirds of groundwater pumped from the Edwards-Trinity (Plateau) aquifer is used for irrigation.
Key issues and approaches for Region J
Drought conditions and reliance on aquifers with limited natural recharge continue to guide water planning efforts across the Plateau region. The regional group’s water plan—updated every five years and projected through 2080—includes groundwater well expansion, non-potable reuse, and smaller-scale improvements to help strengthen future supplies.
Dive deeper into the Interactive 2027 Draft State Water Plan and learn more about Region J.