The AMNet consists of approximately 15 sites across the U.S. and Canada. The function of these sites is to measure ambient air concentrations of gaseous oxidized mercury (GOM), particulate bound mercury (PBM), and gaseous elemental mercury (GEM). This network works to monitor and report atmospheric mercury that causes dry and total deposition of mercury at select MDN sites. AMNet produces high-resolution data to determine atmospheric mercury trends and models, the ecological consequences of mercury discharging sources, and how to adequately control mercury levels.