Approximate potentiometric surface for the aquifer unit A2, Southeastern Coastal Plain aquifer system of the United States, prior to development

A generalized potentiometric surface map prepared as part of the southeastern United States, Regional Sand Aquifer-System Analysis defines the altitude of water levels under conditions prior to development for aquifer unit A2, the upper group of aquifers in the sand aquifer system. Aquifer unit A2, consisting of lower Tertiary sands, is under artesian conditions except locally in the recharge areas. The regional flow direction is to the rivers in the area where the unit outcrops, west toward the Mississippi River in Mississippi, and southward to the Gulf of Mexico in Alabama and West Georgia. In eastern Georgia and South Carolina, the flow is southeast toward the Atlantic Ocean. (USGS)