The Pepiri-Guazu River (Spanish Río Pepirí Guazú, Portuguese Rio Peperi Guaçu) is a river of Argentina and the Santa Catarina state in southeastern Brazil. Its course forms a short portion of the international border between Argentina and Brazil. It flows from north to south into the Uruguay River.
See also List of rivers of Argentina List of rivers of Santa Catarina
References
Rand McNally, The New International Atlas, 1993. Map from Ministry of Transport