[1][2] The spring is located on the property of Jacob's Well Natural Area (JWNA), managed by the Hays County Parks Department.
Until the modern era, the Trinity Aquifer-fed natural artesian spring gushed water from the mouth of the cave, with a measured flow in 1924 of 170 US gallons per second (640 L/s), discharging 6 feet (1.8 m) into the air.
[4][5] Due to excessive pumping to meet supply demands by Aqua Texas (a subsidiary of Essential Utilities), the level of the Trinity Aquifer has dropped, affecting the flow of water through Jacob's Well.
Hays County purchased 50 acres (20 ha) of land around Jacob's Well in 2010, in an attempt to protect the spring from development.
An additional thirty-one acres was transferred to the county from the neighboring Jacob's Well Natural Area (administered at the time by the Wimberley Valley Watershed Association (WVWA)), the new, eighty-acre (32 hectares) named the Westridge Tract.