With the aim of reducing environmental pollution caused by the mercury use in artisanal and small-scale gold mining (ASGM) in Peru, the planetGOLD Peru and GIRH-TDPS projects, GEF initiatives implemented by the Ministry of Environment (MINAM) with the technical assistance of the United Nations Development Program (UNDP), delivered 4 gravimetry pilot plants to reduce the ASGM mercury use in Puno region, located in the south of the country.