Dartmouth Superfund Research Program Director Celia Chen represented Dartmouth College as an observing Civil Society Organization at the third meeting of the Conference of the Parties to the Minamata Convention on Mercury (COP3) in Geneva November 25-29, 2019. The Conference was attended by parties (countries) that have ratified, accepted, approved or accessed the Minamata treaty or are in the process of ratifying it, as well as observers. Currently 115 countries have ratified or accepted the treaty. On June 11, 2013 the US was the first country to sign and accept the treaty. Discussion in “contact groups” (smaller meetings) included a focus on how the effectiveness of the treaty will be evaluated. No agreement was reached by the parties on Effectiveness Evaluation. Dr. Chen also represented Dartmouth at the 10th meeting of the Global Mercury Partnership, which was held prior to COP3, as a member of the Policy Advisory Group (PAG) on Fate and Transport of Mercury. COP4 will be in 2021.