The mission of the Wintergarden Groundwater Conservation District (District) is to conserve, preserve and protect groundwater, as well as to prevent waste of groundwater. The jurisdiction of the District covers Dimmit, La Salle, and Zavala counties. The District follows a publicly developed and state-approved Management Plan to achieve this mission.

The District has completed extensive technical and policy studies to better understand the source(s) and extent of its groundwater resources. Knowing the science of the aquifer is fundamental to the task of managing this critically important resource. The District has worked with Southwest Research Institute (SWRI), Texas A&M University-Texas AgriLife Extension, and the United States Geological Society (USGS) to research our aquifer. The principal aquifers within the District include the Sparta, Queen City, Carrizo-Wilcox, and Yegua-Jackson. The Carrizo Sand portion of the Carrizo-Wilcox Aquifer is the primary source of water in Dimmit, La Salle, and Zavala counties supplying large quantities of water to wells throughout the District. The primary use of Carrizo-Wilcox Aquifer groundwater within the District is for irrigation, municipal use, and oil and gas activities.

The primary objectives and responsibilities of the District are Education; Brush Control; Rainwater Harvesting; Recharge of the Aquifers; Water Quality of the Aquifers; Water Level Monitoring; Water Quality Sampling; Water Well Metering; and Water Well Plugging.