The effect of aquatic plant species biodiversity on water quality is a highly debated issue within the environmental science community. In Bergen County, bodies of water contain many plant species such as acorus calamus and pistia stratiotes. In this research project, we plan to collect several plant samples and water samples from different sections of the Tenakill Brook. As we investigate the biodiversity of aquatic plant species and their effect on water quality, we will see the potential repercussions and applications for Bergen County citizens, and even New Yorkers.