Volume and extent of the Deepwater Horizon oil spill Volume and extent of the Deepwater Horizon oil spill The "Deepwater Horizon" oil spill was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. According to the Flow Rate Technical Group, the leak amounted to about of oil, exceeding the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters and the 1979 Ixtoc I oil spill as the largest spill in the Gulf of Mexico. BP has challenged this calculation saying that it is overestimated as it includes over of oil which was
Oil spill governance in the United States in the U.S. involves a number of federal authorities. The responsibilities of the agency is split into two categories: (1) oil spill anticipation and prevention and (2) oil spill response and cleanup. The single most important authority governing oil spills in the United States is the Federal government. The federal government has jurisdiction over oil responses and oil spills that occur in state and federal navigable waters alike. The location of the Oil spill determines which authority responds. Oil spills that occur in coastal waters are the responsibility of the United States Coast Guard (USCG) while the Environmental Protection Agency