James -- welcome to Pond Boss.
I second, and fully agree with all that ESSHUP says.
I don't have any statistics, but I believe that the majority of the ponds in non-tidal areas of the east coast states, from Georgia into New England, are filled with runoff rainwater. Some rely on water from springs or wells, and maybe even by diverting water from streams, but it is my feeling that they are by far the exceptions.
Please don't be afraid to ask lots of questions. The Pond Boss group has an incredible base of people who can provide very practical advice when building ponds -- from the intial planning, through the first harvests of fish.
Ken
