Lil’ Miss Atrazine is a nationwide project using crowd sourcing methods to collect data on the presence of atrazine in the Mississippi River and its tributaries. In 2014, efforts will be put toward collecting data focused on a single day (June 7 in 2014), to develop a water quality “snapshot” of the Mississippi River watershed. This undergraduate-organized project provides easy-to-use test strips and guidance to citizen scientists who test the water for atrazine at river sites of their choosing.