My primary research has focused on environmental microbiology and water quality. This aspect focuses primarily on understanding the sources, occurrence, and transport of waterborne pathogens using fecal indicator organisms and molecular source tracking. My research interests also include the integration of microbial water quality with hydrological catchment dynamics, landscape patterns, and Quantitative Microbial Risk Assessment to improve water quality policy and management that protect human and ecosystem health. I have recently begun investigating the effects of intervention practices in the healthcare systems to reduce pathogenic agents of hospital associated infections.