Update 2017-05-18: 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. See Revised Hydrogeologic Framework of the Floridan Aquifer System 2016-03.
Update 2016-02-22: Fixed URLs for DEP files.
Salt water and other solids are coming up in Florida wells far inland from the sea, right up to the state line, and it probably doesn’t stop there. The problem is worse on the coasts and in south Florida, but north central Florida is not immune, judging by these preliminary maps by the Florida Department of Environmental Protection. Likely culprits would seem to include overpumping. Continue reading