This online webinar will look into how atmospheric mercury monitoring can support the Minamata Convention – policy making, implementation and evaluation. This event will focus on comparability of measurements of the three forms of atmospheric mercury: gaseous elemental (GEM), gaseous oxidized (GOM), and particulate bound (PBM). Currently, comparability of GEM can be demonstrated, while limited metrological infrastructure for traceable, validated, and accurate measurements of oxidized mercury species in the atmosphere exists.