MERCURE is an atmospheric dispersion modeling CFD code developed by Électricité de France (EDF) and distributed by ARIA Technologies, a French company. MERCURE is a version of the CFD software ESTET, developed by EDF's Laboratoire National d'Hydraulique. Thus, it has directly benefited from the improvements developed for ESTET. When requested, ARIA integrates MERCURE as a module into the ARIA RISK software for use in industrial risk assessments.