Waterfalls are mainly found in the "upstate" parts of South Carolina.  I was able to find a book similar to the one used for North Carolina titled "The Waterfalls of South Carolina" by Benjamin Brooks and Tim Cook.  Additionally we regularly use a map that we obtained from the South Carolina visitors center, "Waterfalls of the South Carolina Upcountry".  This map was not on display, but when I asked specifically about waterfalls it was provided from behind the desk.  We really got good use out of the map as it shows a numeric map of the waterfall locations and makes it easier to plan a trip based on the waterfalls located in a particular area.

Brasstown Falls

Bull Sluice

Chau-Ram Falls - added 09/09

Fall Creek Falls

Issaquenna Falls
King Creek Falls - added 11/08

Licklog Falls - added 09/09

Pigpen Falls - added 09/09

Reedy River Falls

Spoonauger Falls - added 11/08

Station Cove Falls

Twin Falls (SC) - updated 11/08

Wildcat Branch Falls