Tritium and salinity data were used in an investigation of the transport and fate of freshwater on the South Atlantic Bight (SAB) shelf. Simultaneous tritium and salinity samples were collected at selected locations as part of the April 1985 Spring Removal Experiment (SPREX). A three-source mixing model was used with tritium and salinity as tracers to determine if fresh water from the Savannah River could be distinguished from other freshwater sources on the SAB inner shelf. Variations in tritium concentration, integrated freshwater fraction, and model results were related to hydrographic and meteorological conditions. Results suggest that salinity and tritium concentration can be used to identify Savannah River water on the shelf and that Savannah River water maintains a distinct tritium-salinity relationship at least as far north as Charleston, South Carolina. Thus tritium may be a convenient and useful tool for studying nearshore mixing and transport processes in the SAB. ¿ American Geophysical Union 1988