Updated 2026-04-23: Improved figure implementation, added springs map, and for desalination see also https://wwals.net/issues/wfnf.

Salt water intrusion inland is worse than you think, including the “Apalachicola salinity feature” up to the GA-FL line and east through Lowndes County, with a special additional brackish Valdosta feature. Central north Florida is an island of fresh groundwater surrounded by entire saline Florida coast around from Alabama plus across to Brunswick, GA, then again from Savannah up past Charleston. South of Lakeland, FL the map is all red for saline.

Salt water intrusion inland is worse than you think, Apalachicola salinity feature, and all the coasts of Florida

Apparently using the data preliminarily mapped earlier in the Florida Well Salinity Study, geologists from three states connected the dots in Revised Hydrogeologic Framework of the Floridan Aquifer System in Florida and Parts of Georgia, Alabama, and South Carolina, By Continue reading →