Region O: Llano Estacado
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 O in the High Plains of Texas. Known for wide-open landscapes, this region relies on groundwater to support its large farming, livestock, and energy industries.
Primary Water Source: Ogallala Aquifer
Approximately 95 percent of this region’s water comes from groundwater sources, with the Ogallala Aquifer being the largest. An aquifer is like a sponge underground that holds water from rain and rivers after it soaks into the ground. The Ogallala is the largest aquifer in the U.S.
Key issues and approaches for Region O
Irrigation demand and reliance on aquifers dependent on rain for recharge guides planning across the Llano Estacado area. The regional water plan—updated every five years and projected through 2080—highlights agricultural conservation, groundwater well expansion, and direct potable reuse to improve water reliability.
Dive deeper into the Interactive 2027 Draft State Water Plan and learn more about Region O.