Potentiometric Surface of the Upper Floridan Aquifer in the Coastal Area of Georgia, September 2000

The aquifer system is one of the most productive in the United States and a major source of water in the coastal area of Georgia. In 1997, approximately 347 million gallons per day (Mgal/d) of ground water was withdrawn in coastal Georgia mainly for industrial and irrigation purposes (Fanning, 1999).

This report shows the potentiometric surface of the Upper Floridan aquifer in coastal Georgia for September 2000. The potentiometric surface, which represents the altitude at which water would have stood in tightly cased wells open to the Upper Floridan aquifer, was constructed by using water-level and pressure measurements collected from 225 wells during September 2000. The distribution of data used to construct the map is similar to a previously contoured map (Peck and others, 1999) with the exception of the Jesup, Wayne County area.