This dataset contains breakthrough curves calculated from particle tracking simulations of the dye experiment at Searcys Bend for each of the seven fluorometer locations. Breakthrough curves were generated using a custom script written in the Python programming language that counts the number of points within a pre-defined polygon representing a fluorometer location at each timestep. Two different polygon types were used: one with a buffer of 15 meters around each fluorometer location, with the other being a 10-meter-wide rectangle centered over the fluorometer location perpendicular to the direction of flow and covering the entire width of the channel. Breakthrough curves were generated using both polygon types for each model corresponding to a multiple of the lateral eddy viscosity (LEV) parameter, resulting in a total of 8 different files.