Dr. Fahrenfeld is an environmental engineer working on water and sediment quality issues through applied organic chemistry and microbiology. Previous research projects include (1) remediation of oil, solvent, and explosives contaminated aquifer sediments, (2) fate and transport of microplastics in freshwater environments, (3) microbial source tracking in mixed land use watersheds, (4) water quality impacts of wastewater from unconventional oil and gas development, and (5) antibiotic resistance in agricultural, reclaimed water, and urban water systems.