The purpose of this study was to determine distribution of fluoride (F) content in surface soil of Isfahan province. The fluoride adsorption/ desorption and movement in a calcareous soil and the cumulative daily F intake and health risk assessment were another parts of this study. In the third part of the study, spinach and alfalfa was planted in lysimeters with three replications. To evaluate F content in surface soil (part 1), 257 topsoil samples in an area of 6800 km 2 in Isfahan province were collected. The average of total F content (106.7 mg kg -1 ) and soluble F content (0.88 mg L -1 ) were respectively lower and greater than the world's average. Maximum sorption capacity (q max ) of F calculated from Langmuir model was 0.4 mg g -1 for calcareous soils. For part 3, the treatments included two concentrations of F and bromide (Br) that were added to the soil surface as sodium fluoride and potassium bromide salts, respectively. Hydrus-1D program was employed to model the movement of F in the soil. The highest concentrations of total F and water soluble F were observed in the surface soil layer. The maximum of EDI estimates for cereals, vegetables, and water exposure routes were 36 and 29.4µg kg -1 day -1 for children and adults, respectively, in the last study. Keywords : fluoride, kriging, HYDRUS-1D, hazard quotient
