Longevity, mobility, and dissipation of Termidor® SC termiticide/ insecticide (fipronil) at the highest recommended label rate (0.125%) was applied to sandy loam soil in greenhouse experiments to simulate field application. High-performance liquid chromatography was used to analyze soil and leachate samples at regular intervals for 12 months after treatment. The mean concentrations of fipronil from initial treated soil and leachate samples were 1,101.75 ± 24.21 µg/g and 0.00 ± 0.00 µl/liter, respectively. Fipronil was recovered from all soil samples throughout the study; however, no fipronil was found in leachate samples. At all post-treatment analyses the highest concentration of fipronil recovered was in the middle soil profile. Results of this study indicated that fipronil was bound to the soil, and there was little movement of the active ingredient within the soil profile.