Ecotoxicology  at  EDV, Inc.,  is to advance the science and practice of ecological risk assessment (ERA).  We focus on developing tools and technical resources to assess the impacts of chemical, physical, and biological stressors on ecosystems.  Our current focus is on aquatic ecosystems.  We focus on “evaluating the likelihood that adverse ecological effects may occur or are occurring as a result of exposure to one or more physical, chemical, or biological stressors.”