Hem -

A tool primarily used by the US EPA to perform risk assessments for air toxics. It predicts inhalation risks by modeling pollutant concentrations in the vicinity of industrial facilities.

A software application used to index data for the National Hydrography Dataset (NHD) , helping government programs manage water-related geographic events. 2. Medical & Health Sciences Human Exposure Model (HEM) | US EPA A tool primarily used by the US EPA

A dynamic simulation engine that calculates the energy performance of residential buildings in 30-minute intervals. This model is replacing older steady-state approaches to better represent modern low-carbon technologies. A tool primarily used by the US EPA