This study focused on four varying concentrations of atrazine commonly found within an oyster's environment. In order to reproduce ecologically relevant concentrations of atrazine within our experiments, data resources overseen by the EPA and USDA were examined and cross referenced with pesticide and herbicide datasets taken by various external sources (USDA 2006; Flood et al. 2015; Powell et al. 2017; Hively et al. 2011; EPA 2017). Concentrations of atrazine were observed to be highest in the upper tributaries of the Chesapeake Bay. The following outlines the chosen concentrations and the reasoning for choosing the concentration.