The goal of my research is to improve environmental policies through the development of better decision-making tools. These tools include statistical analyses, simulation models, mechanistic models of contaminant fate and transport, benefit-cost analyses, decision analytic models, and an understanding of human risk perception. In my research I try to provide as integrated a view of the issue as possible and to treat important uncertainties in a quantitative fashion. I am currently involved in a project modeling national exposure to contaminants in drinking water and estimating the costs and benefits of stricter drinking water standards. I am interested developing research projects to address the environmental health issues associated with the U.S.-Mexico border region, such as providing safe drinking water and adequate sanitation to low-income populations, prioritizing among different risks, and understanding the relationship between economic status and exposure to environmental health risks.