This project aimed to use vetiver grass to degrade phenol in the accessible illegal dumping source zone, contaminated runoff, and a shallow groundwater plume within surface water (Tad-Noi creek). Two strategies for using vetiver systems include: 1) using vetiver grass on a floating platform for the treatment of phenol-contaminated wastewater; and 2) using vetiver hedgerows along Tat-Noi creek to decrease the exposure of villagers to residual phenol migrating along the creek.