Bill, I am somewhat certain that Bermuda must be a coral atoll and on all atolls, even the driest and the smallest, there is always an elliptical body of fresh water *above the saline water table. It has to do with specific gravity/ fresh water is lighter than saline; this principle is called the ?Gaben Herzberg law. I might have got the name of the law wrong, but this phenomenon is well established and has been exploited by generations of Pacific Islanders long before modern science discovered it.