Radon and gamma dose rates were surveyed in five Slovenian spas, at Rogaska Slatina, Radenci, Moravci, Podcetrtek, and Catez. Due to effective ventilation systems, the indoor air radon concentration rarely exceeds 200 Bq x m(-3) and is usually lower. Uncer the present operationsal conditions and working regimes of the spas, there is no basis for concern about elevated exposure of personnel to radon.