At least my well still has fresh water. Although I don't know the chloride concentrations, it's still potable for now. There have been some deeper wells in the Floridan aquafer that had to be shut down due to salt water intrusion. With the the local pulp mill pulling out 50 MGD, that's no surprise. As an update, the extreme high tides of last week caused a bit of flooding. My sister's home on another island had the same thing happen to her landscaping, killed by salt water. It seems there was some rare alignment responsible for the unusual high tides. So I guess this must have happened before, but not since I moved out here.