EPA is announcing the availability of a report entitled Inventory of Mercury Supply, Use, and Trade in the United States: 2020 Report, which provides an inventory of mercury supply, use, and trade in the United States. This is the first report in which the supply, use, and trade of mercury is presented based on data collected by EPA under the final rule Mercury; Reporting Requirements for the TSCA Mercury Inventory, codified in 40 CFR part 713 (83 FR 30054, June 27, 2018)(FRL-9979-74). Persons subject to the reporting requirements in 40 CFR This is a prepublication version of the document signed on March 26, 2020. The document is pending publication in the Federal Register. Although EPA has taken steps to ensure the accuracy of this pre-publication version, it is not the official version. 3 part 713 submitted information directly to EPA via the Mercury Electronic Reporting (MER) application, which is accessed through the Agencys Central Data Exchange (CDX). The deadline for reporting mercury information to EPA was July 1, 2019 for reporting activities that occurred in the calendar year 2018, and the inventory collection, reporting, and publication cycle will continue every three years thereafter.