The near surface sediments in the Gulf Coastal plain are typically composed of sands and gravels without a carbonate aquifer. That explains the near lack of calcium and hardness. That Sand and Gravel aquifer stretches westward from just east of Pensacola, FL. That aquifer is typically fed locally from direct rainfall and the ionic content is therefore low. The sediments can sometimes contain iron that leaches into the very soft groundwater. I see that this water does not really have that problem.
Where this aquifer is not affected by salt water intrusion, it is a very high quality water source but can easily be contaminated by spills at ground surface. The sandy sediments allow those contaminants to quickly enter the aquifer.
As I mentioned, there is a bust in the concentrations quoted for this water. Since it is likely suffering from salt water intrusion from the Gulf, its more likely that the chloride concentration is not accurate. It is more likely on the order of over 25 ppm. Still good enough for brewing.