This Technical Progress Report is aimed to report on the work made by the CNR-IIA team, during the period December 2014 – June 2018, for the implementation of the Air Component of the GEF funded project “Development of a Plan for Global Monitoring of Human Exposure to and Environmental Concentrations of Mercury” (hereinafter referred to as ‘the Project’), agreed between the United Nations Environment Programme (UNEP) and the National Research Council - Institute of Atmospheric Pollution Research (CNR-IIA), through the project Cooperation Agreement (signed by CNR-IIA on 2nd December 2014) and its successive Amendment N. 1 to the Project Cooperation Agreement (signed by CNR-IIA on6th September 2016).