This paper describes radon mass exhalation rate (Jm) and thoron surface exhalation rate (Js) of 46 soil samples of district Faridabad, Southern Haryana, India. Scintillation detector based SMART RnDuo (AQTEK System, India) coupled with exhalation chamber was used. Outdoor gamma exposure rate was measured by GM counter based survey meter. Jm of one sample and Js of 95% samples were found higher than world average values of 57 mBq kg−1 h−1 and 3600 Bq m−2 h−1 for Jm and Js respectively reported by UNSCEAR 2000. No significant correlation was observed between radon/thoron exhalation rates with outdoor gamma exposure rate.