central Texas. This carbonate aquifer has historically been providing high quality water for nearly 2 million people, and even today, is full because of tremendous recharge from a number of area streams, rivers and lakes. The primary risk to this resource is human development over the recharge areas. See also References External links IGRAC International Groundwater Resources Assessment Centre The Groundwater Project - Online platform for groundwater knowledge Hydraulic engineering Hydrology Hydrogeology Water and the environment Bodies of water Water supply