Pesticide uses in the watershed are widespread, due to the predominant agricultural land uses in the watershed. These pesticides can migrate into the Zanja de Cota waterbody from stormwater transport, leach into Tribal groundwater resources, and be dispersed through aerial deposition.

This project involved implementing on-the-ground BMPs including constructing bioswales and planting trees along the riparian corridor to reduce pollution loading onto the Reservation and into Tribal waters. Blue Tomorrow was responsible for baseline pollutant sampling, designing and logistical planning of bioswale and Best Management Practices, post-BMP pollutant sampling and monitoring, and developing a pollutant sampling technical results memo.