Mercury is a pollutant of global concern due its potential impact on human health and the environment. It is released to the atmosphere form a number of anthropogenic and natural sources and deposits to oceans and terrestrial ecosystems affecting the food chain and ultimately human health. Considering their pathways of exposure for people, surveillance of humans and the environment is necessary. Current effort at European level is aimed to develop a Transnational Environmental Observation System in Support of European & International Policies through the Integration of real-time monitoring data from various platforms, modelling tools and advanced global cyber-infrastructure for data sharing and interoperability. EC is also supporting the activity of the Expert Group on Effectiveness Evaluation of the Minamata Convention for which the Showcase Coordinator has been nominated as European Representative.